El-Ghany, Mona F. Abd, Mohamady I. El–Kherbawy, Youssef A. Abdel-Aal, and Manar Hussien Abbas. “Effect of Growth Seasons and Nitrogen Fertilization on the Growth, Yield and Nitrate Accumulation of Lettuce (Lactuca Sativa L.) Plants”. International journal of health sciences 6, no. S4 (July 6, 2022): 7053–7066. Accessed May 21, 2025. https://sciencescholar.us/journal/index.php/ijhs/article/view/10399.