Masood, H. and Khan, L. (2004) “STUDIESON SODIUM SULPHIDE PREPAREDFROM SODIUM SULPHATE”, Biological Sciences - PJSIR, 47(2), pp. 163–165. Available at: https://v2.pjsir.org/index.php/biological-sciences/article/view/1490 (Accessed: 17 April 2025).