Ashraf, Muhammad Yasin. “?PHOTOSYNTHETIC EFFICIENCY OF WHEAT UNDER WATER STRESS CONDITIONS”. Biological Sciences - PJSIR 41, no. 3 (June 22, 1998): 156–163. Accessed January 23, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2260.