@INBOOK {NWEKE:1988e,
title = {Collecting and interpreting relevant data required to link research results from varying environments: an economist's perspective},
author = {Nweke, F. },
year = {1988},
type = {Cassava-based cropping systems research 1},
pages = {37--45},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
}