@BOOK {UMEH:1992, title = {Lutte biologique naturelle contre la cecidomyie africaine du riz au Nigeria: Guide de recherche de l'Iita, No. 37}, author = {Umeh, E. D. N. * and Ukwungwu, M. N. * and Joshi, R. C. }, series = {Guide de recherche de l'Iita, No. 37}, year = {1992}, month = {February}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, isbn = {16p.}, }