Dewi, E.M., Suwardi, ., Suryaningtyas, D.T. and Anwar, S. 2017. Utilization of Natural Zeolites as Cu (Ii) and Zn (Ii) Adsorbent. JOURNAL OF TROPICAL SOILS. 21, 3 (Feb. 2017), 153–160. DOI:https://doi.org/10.5400/jts.2016.v21i3.153-160.