@BOOK {USAID-IITA:1988a, title = {Maize-based cropping systems in the NDOP plain of the north west province, Cameroon: a monitored farm survey, with labor utilization data}, author = {USAID, and IITA, and IRA, }, year = {1988}, publisher = {USAID, IITA & IRA}, address = {Republic of Cameroon}, note = {CRP Maize; Pdf can be access through KC staff Mgt. 114p.}, }