Jonathan, S., Joseph, M., Idenyi, E. S., and Hamidu, K. “TECHNICAL EFFICIENCY OF SOLE COWPEA PRODUCTION IN ADAMAWA STATE, NIGERIA”. Journal of Agripreneurship and Sustainable Development 5, no. 3 (September 21, 2022): 1–14. Accessed April 25, 2024. http://njaat.atbu.edu.ng/index.php/jasd/article/view/329.