“?EFFECT OF AMMONIUM SULFATE-SULFUR MIXTURE ON THE DIFFUSIVITY AND INDEX OF ACTIVITY OF AMMONIUM SULFATE” (2021) Biological Sciences - PJSIR, 41(3), pp. 113–115. Available at: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2247 (Accessed: 10 March 2026).