Raja, P. M., & Nurfajriani, N. (2017). Preparation Adsorbent Chitosan of Shell Horseshoe Crab (Tachypleus gigas) and Gelatine to Reduce Pb Content. Jurnal Pendidikan Kimia, 9(1), 282–285. https://doi.org/10.24114/jpkim.v9i1.6203