Sapada, Ibrahim, and Wita Asmalinda. “The Vital Lung Capacity of Employees With Risk Factors for Potential Exposure to Ammonia Gas”. jitek 8, no. 1 (September 30, 2020): 1-13. Accessed November 6, 2026. https://www.poltekkesjakarta3.ac.id/ejurnalnew/index.php/jitek/article/view/348.