@ARTICLE {SHANNON:1994, title = {Adoption of soybeans in sub-Saharan Africa: a comparative analysis of production and utilization in Zaire and Nigeria}, author = {Shannon, D. A. and Kalala, M. M. }, journal = {Agricultural Systems}, year = {1994}, volume = {46}, number = {4}, pages = {369--384}, issn = {0308-521X}, }