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Williams, R.J. ,  [A whitefly transmitted mosaic of lima bean in Nigeria: paper presented at the Fifth Annual Conference of the Nigerian Society for Plant Protection, Samaru, Nigeria, March 35, 1975] ,  A whitefly transmitted mosaic of lima bean in Nigeria: paper presented at the Fifth Annual Conference of the Nigerian Society for Plant Protection, Samaru, Nigeria, March 35, 1975

Williams, R.J. ,  [Anthracnose of cowpea] ,  Anthracnose of cowpea

Williams, R.J. ,  Agboola, S.D. ,  Schneider, R.W. ,  [Bacterial wilt of cassava in Nigeria] ,  Bacterial wilt of cassava in Nigeria

Gilmer, R.M. ,  Williams, R.J. ,  [Etiology, epidemiology and control of cowpea mosaic disease: paper presented at the Fourth Annual Conference of the Nigerian Society for Plant Protection, International Institute of Tropical Agriculture, Ibadan, Nigeria, February 11-13, 1974] ,  Etiology, epidemiology and control of cowpea mosaic disease: paper presented at the Fourth Annual Conference of the Nigerian Society for Plant Protection, International Institute of Tropical Agriculture, Ibadan, Nigeria, February 11-13, 1974