@MANUAL {SINGH:1979f,
title = {Cowpea pests and diseases},
author = {Singh, S. R. and Allen, D. J. },
year = {1979},
note = {Cowpea; Cowpea Pests; Cowpea Diseases; Cowpea Pests and Diseases; Learning Material; Manual series No. 2; 114p.},
}