Lam HL, Mohd Salleh R. Root Cause Analysis on Process Monitoring in Ammonium Sulphate Fertilizer Production. EKST [Internet]. 2024 Dec. 17 [cited 2026 Apr. 9];4(2):181-90. Available from: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/14215