Zainal Bakri, S.F. (2019) “Evaluation of Industrial Workplace Exposure to Metal Fumes using Toenail as Bio-Indicator”, International Journal of Integrated Engineering, 11(5), pp. 133–139. Available at: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/4607 (Accessed: 7 April 2026).