Awoke , M. U. and Okorji , E. C. (2004) “3 - The Determination and Analysis of Constraints in Resource Use Efficiency in Multiple Cropping Systems by Small-Holder Farmers in Ebonyi State, Nigeria: DOI: 10.4314/ad.v29i3.22199”, Africa Development, 29(3). doi: 10.4314/ad.v29i3.22199.