I. E. Ezeaku, B. N. Mbah, and K. P. Baiyeri. "RESPONSE OF COWPEA (vigna unguiculata (L.)Walp) GENOTYPES TO SOWING DATES AND INSECTICIDE SPRAY IN SOUTH EASTERN NIGERIA." Journal of Animal and Plant Sciences, vol. 27, no. 1, 2017, pp. 239-245.