Anggriyani, Emiliana, and Alfani Risman Nugroho. “GREEN TECHNOLOGY ON TANNING PROCESS BY EXHAUSTED TANNING SYSTEM”. MATTER: International Journal of Science and Technology 4, no. 3 (November 15, 2018): 34–42. Accessed December 23, 2024. https://grdspublishing.org/index.php/matter/article/view/1596.