TY - BK AU - Walsh,J. TI - Preserving the options: Food productivity and sustainability T2 - CGIAR Issues in Agriculture PY - 1991/// CY - Washington, DC (USA) PB - CGIAR, KW - Agricultural development KW - AGROVOC KW - CGIAR KW - Development aid KW - Food production KW - Research policies KW - Technical aid KW - Research institutions ER -