Iqba, Muhammad Zalar, Qudsia Abbas, and Muhammad Shafiq. “TOXIC EFFECTS OF COPPER AND ZINC ON GERMINATION AND SEEDLING GROWTH OF SOME TREES”. Biological Sciences - PJSIR 44, no. 6 (December 24, 2001): 351–355. Accessed May 16, 2024. http://v2.pjsir.org/index.php/biological-sciences/article/view/1972.