@BOOK {IITA:1992h, title = {Joint Project 31: Semi-Arid Food Grains Research and Development SAFGRAD II: Annual Report}, author = {IITA, and OAU/STRC, }, booktitle = {Maize and Cowpea Collaborative Research Networks for West and Central Africa: Annual Report}, year = {1992}, month = {November}, publisher = {IITA/SAFGRAD}, address = {Ouagadougou, Burkina Faso}, }