GUO, DE- PING, and YVN-ZI SUN. “Estimation of Leaf Area of Stem Lettuce (Lactuca Sativa Var Angustana) from Linear Measurements”. The Indian Journal of Agricultural Sciences 71, no. 7 (April 23, 2014). Accessed June 14, 2026. https://epubs.icar.org.in/index.php/IJAgS/article/view/39967.