@BOOK {OKOCHA:1994, title = {Field varietal screening against African rice gall midge: IITA research guide, No. 34}, author = {Okocha, P. I. * and Ukwungwu, M. N. * and Joshi, R. C. }, series = {IITA research guide, No. 34}, year = {1994}, month = {June}, publisher = {International Institute of Tropical Agriculture (IITA)}, note = {19p.}, }