Maarten van Ginkel, Douglas G. Tanner, editors ; sponsored by Canadian International Development Agency (CIDA) and the International Maize and Wheat Improvement Center (CIMMYT)International Maize and Wheat Improvement Center1988
全国の図書館
件名Wheat -- Congresses Wheat -- Africa -- Congresses
件名(識別子)Wheat -- Congresses Wheat -- Africa -- Congresses