Journal Article
                        
                        Anyiro, Chidozie Onyedikachi, Christopher Ogbonna  Emerole, Charles Kelechi  Osondu, Solomon Chinyere  Udah, and Silas Ebuka  Ugorji.  
"Labour-Use Efficiency By Smallholder Yam Farmers In Abia State Nigeria: A Labour-Use Requirement Frontier Approach." International Journal of Food and Agricultural Economics 1, no. 1 (2013): 151-163.