@ARTICLE {MANYONG:1997,
title = {Spatial patterns of biological constraints to cassava and yam production in West and Central Africa: Implications for technology development and transfer},
author = {Manyong, V. and Oyewole, B. },
journal = {African Journal of Root and Tuber Crops},
year = {1997},
volume = {3},
pages = {15--21},
note = {RTB; Root and Tuber.; IITA Technologies},
}