Carillo, Lorraine A, and Susan M Gallardo. “Heavy Metals Characterization of Sludge from a Philippine Recycling Paper Mill”. ASEAN Journal of Chemical Engineering 4, no. 2 (December 31, 2004): 58-65. Accessed November 23, 2024. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7625.