@BOOK {AKEM:1996, title = {Management of soybean diseases: IITA research guide, No. 40}, author = {Akem, C. }, series = {IITA research guide, No. 40}, year = {1996}, month = {March}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {36p.}, }