Sivakumar, P. Sethuraman, et al. , translators. “Estimation of Farmers’ Willingness-to-Pay for Quality Planting Material of Greater Yam (Dioscorea Alata L.)”. Indian Journal of Extension Education, vol. 58, no. 2, Mar. 2022, pp. 135-9, https://doi.org/10.48165/IJEE.2022.58226.