@PROCEEDINGS {AY:1984a,
title = {Cowpea variety selection: the user case},
author = {Ay, P. and Kofi Fosu, },
booktitle = {Presented at the First World Cowpea Research Conference, 4-9 November, IITA},
year = {1984},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
}