@MISC {WILLIAMS:1975h, title = {Identification of multiple disease resistance in cowpea: abstract of papers presented at the Fourth Annual Conference of the Nigerian Society for Plant Protection, International Institute of Tropical Agriculture, Ibadan, Nigeria, February 11-13, 1974}, author = {Williams, R. J. }, year = {1975}, month = {February}, howpublished = {NSPP abstracts 1972-1975: occasional publication, number 1 of the Nigerian Society for Plant Protection. p. 19}, }