@INBOOK {OLANIYAN:2001,
title = {The dynamics of the root and tuber cropping systems in the middle belt of Nigeria},
author = {Olaniyan, G. and Manyong, V. and Oyewole, B. },
year = {2001},
type = {Root crops in the 21st century: proceedings of the 7th Triennial Symposiu,m of the International Soceity for Tropical Root Crops (ISTRC) - Africa Branch, Oct 1998},
pages = {75--82},
publisher = {International Soceity for Tropical Root Crops (ISTRC) - Africa Branch; Government of Benin},
}