@INBOOK {VOGEL:1991, title = {On-farm trials comparing the local streak-disease susceptible maize with a streak-disease resistant variety in south-eastern Zaire}, author = {Vogel, W. O. and Berhe, T. and Hennessey, R. D. }, year = {1991}, type = {On-farm research in theory and practice, edited by H.J.W. Mutsaers and P. Walker}, pages = {176--189}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }