Suratno, S., Purbayanti, D., & Hildayanti, H. (2018). Cholinesterase Activity on Palm Oil Plantation Workers in Parenggean, Kotawaringin Timur. Jurnal Surya Medika (JSM), 3(2), 69–75. https://doi.org/10.33084/jsm.v3i2.100