@INBOOK {OSIRU:1990,
title = {Agronomy},
author = {Osiru, D. * and Ezumah, H. C. },
year = {1990},
type = {Cassava in tropical Africa: a reference manual},
pages = {53--68},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
}