@BOOK {AKANDE:1981, title = {International Institute of Tropical Agriculture}, author = {Akande, S. B. and Lawani, S. M. }, booktitle = {Record of Publications}, year = {1981}, volume = {I}, number = {iv. 89 p.}, edition = {1969 - 1980}, publisher = {IITA}, address = {Ibadan}, }