Atroosh, K. B., and M. A. Al-Moayad. “Water Requirements of Qat (<i>Catha edulis</I>) Cultivation in the Central Highlands of Yemen”. Journal of Scientific Research 4, no. 1 (December 23, 2011): 77. Accessed April 16, 2024. https://banglajol.info/index.php/JSR/article/view/7544.