Sivakumar, P. Sethuraman, M. Nedunchezhiyan, P. Adhiguru, and S. K. Jata. “Estimation of Farmers’ Willingness-to-Pay for Quality Planting Material of Greater Yam (Dioscorea Alata L.)”. Indian Journal of Extension Education 58, no. 2 (March 26, 2022): 135–139. Accessed October 22, 2025. https://epubs.icar.org.in/index.php/IJEE/article/view/122596.