“The Morphological Change in Sunflower Plant under Hardening Conditions to Drought Tolerance. II. Leaf Number and Leaf Area”. Baghdad Science Journal 6, no. 3 (September 6, 2009): 470–479. Accessed May 19, 2024. https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1005.