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Williams, R.J.[Screening cowpeas for resistance to cowpea virus: paper presented at the Fifth Annual Conference of the Nigerian Society for Plant Protection, Institute of Agricultural Research, Samaru, Nigeria, March 35, 1975]Screening cowpeas for resistance to cowpea virus: paper presented at the Fifth Annual Conference of the Nigerian Society for Plant Protection, Institute of Agricultural Research, Samaru, Nigeria, March 35, 1975

Williams, R.J.[The international testing program: aims, progress and problems seen from IITA]The international testing program: aims, progress and problems seen from IITA
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

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