@BOOK {AKEM:1991c, title = {Soybean diseases: biology, identification, control and management: IITA research guide, No. 40}, author = {Akem, C. }, series = {IITA research guide, No. 40}, year = {1991}, month = {October}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {32p.}, }