“?MEDIAN LETHAL CONCENTRATION OF COPPER TO GOLDFISH CARASSIUS AURATUS LINNAEUS”. Biological Sciences - PJSIR 38, no. 5-6 (June 19, 1995): 196–199. Accessed July 26, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2472.