Sivakumar, P. Sethuraman, M. Nedunchezhiyan, P. Adhiguru, and S. K. Jata. 2022. “Estimation of Farmers’ Willingness-to-Pay for Quality Planting Material of Greater Yam (Dioscorea Alata L.)”. Indian Journal of Extension Education 58 (2): 135-39. https://doi.org/10.48165/.