Buku Paket Siswa
Kimia KurMer XII
Buku ini disajikan dengan cara yang komunikatif dan mengajak pembaca untuk berpikir kritis .
Ketersediaan
#
Perputakaan - Bos
540 KEM k
540-2619
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2620
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2621
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2622
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2623
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2624
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2625
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2626
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2627
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2628
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2629
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2630
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2631
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2632
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2633
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2634
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2635
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2636
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2637
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2638
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2639
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2640
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2641
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2642
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2643
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2644
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2645
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2646
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2647
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2648
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2649
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2650
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2651
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2652
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2653
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2654
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2655
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2656
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2657
Currently On Loan (Due on 2025-05-01)
#
Perputakaan - Bos
540 KEM k
540-2658
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2659
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2660
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2661
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2662
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2663
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2664
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2665
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2666
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2667
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2668
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2669
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2670
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2671
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2672
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2673
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2674
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2675
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2676
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2677
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2678
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2679
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2680
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2681
Currently On Loan (Due on 2026-07-20)
#
Perputakaan - Bos
540 KEM k
540-2682
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2683
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2684
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2685
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2686
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2687
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2688
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2689
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2690
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2691
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2692
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2693
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2694
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2695
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2696
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2697
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2698
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2699
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2700
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2701
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2702
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2703
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2704
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2705
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2706
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2707
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2708
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2709
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2710
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2711
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2712
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2713
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2714
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2715
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2716
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2717
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2718
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2719
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2720
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2721
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2722
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2723
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2724
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2725
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2726
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2727
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2728
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2729
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2730
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2731
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2732
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2733
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2734
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2735
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2736
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2737
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2738
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2739
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2740
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2741
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2742
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2743
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2744
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2745
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2746
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2747
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2748
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2749
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2750
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2751
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2752
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2753
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2754
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2755
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2756
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2757
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2758
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2759
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2760
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2761
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2762
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2763
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2764
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2765
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2766
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2767
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2768
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2769
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2770
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2771
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2772
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2773
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2774
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2775
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2776
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2777
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2778
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2779
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2780
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2781
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2782
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2783
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2784
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2785
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2786
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2787
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2788
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2789
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2790
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2791
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2792
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2793
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2794
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2795
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2796
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2797
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2798
Currently On Loan (Due on 2025-07-28)
#
Perputakaan - Bos
540 KEM k
540-2799
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2800
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2801
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2802
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2803
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2804
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2805
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2806
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2807
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2808
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2809
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2810
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2811
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2812
Currently On Loan (Due on 2026-07-17)
#
Perputakaan - Bos
540 KEM k
540-2813
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2814
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2815
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2816
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2817
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2818
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2819
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2820
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2821
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2822
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2823
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2824
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2825
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2826
Currently On Loan (Due on 2026-07-16)
#
Perputakaan - Bos
540 KEM k
540-2827
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2828
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2829
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2830
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2831
Currently On Loan (Due on 2026-07-10)
#
Perputakaan - Bos
540 KEM k
540-2832
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2833
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2834
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2835
Tersedia
#
Perputakaan - Bos
540 KEM k
540-2836
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2837
Currently On Loan (Due on 2026-07-13)
#
Perputakaan - Bos
540 KEM k
540-2838
Currently On Loan (Due on 2026-07-13)
Informasi Detail
- Judul Seri
-
-
- No. Panggil
-
540 KEM k
- Penerbit
- Jakarta : Kementrian Pendidikan dan Kebudayaan, Riset dan Teknologi., 2022
- Deskripsi Fisik
-
xiv, 210 hlm.; 176 mm x 250 mm
- Bahasa
-
Indonesia
- ISBN/ISSN
-
9789024279226
- Klasifikasi
-
500
- Tipe Isi
-
-
- Tipe Media
-
-
- Tipe Pembawa
-
-
- Edisi
-
cet 1
- Subjek
-
-
- Info Detail Spesifik
-
xiv, 210 hlm.; 176 mm x 250 mm
- Pernyataan Tanggungjawab
-
IKAPI
Versi lain/terkait
Tidak tersedia versi lain
Lampiran Berkas
Tidak Ada Data
Komentar
Anda harus masuk sebelum memberikan komentar
Karya Umum 
Filsafat 
Agama 
Ilmu-ilmu Sosial 
Bahasa 
Ilmu-ilmu Murni 
Ilmu-ilmu Terapan 
Kesenian, Hiburan, dan Olahraga 
Kesusastraan 
Geografi dan Sejarah