@INBOOK {THOTTAPPILLAY:1988, title = {Virus diseases of cowpea in Nigeria and development of multiple virus resistant cowpea lines}, author = {Thottappilly, G. and Rossel, H. W. and Singh, B. }, year = {1988}, type = {Vth International Congress of Plant Pathology: abstract of papers}, pages = {383}, address = {Kyoto}, }