@INPROCEEDINGS {WIEN:1975c,
title = {Yield physiology of cowpea (Vigna unguiculata, L. Walp): a review of work at IITA},
author = {Wien, H. C. },
booktitle = {Proceedings of Physiology Program Formulation Workshop held at IITA, Ibadan, April, 1975.},
year = {1975},
month = {April},
pages = {74--76},
}