@INBOOK {OSIRU:1990a,
title = {Data collection and organization},
author = {Osiru, D. * and Hahn, S. K. },
year = {1990},
type = {Cassava in tropical Africa: a reference manual},
pages = {121--137},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
}