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International Institute of Tropical Agriculture ,  [Project E: livelihoods, improving the resource base, and protecting the environment through starchy staple, periurban, and tree crop systems of the humid and subhumid zones of west and central Africa] ,  Project E: livelihoods, improving the resource base, and protecting the environment through starchy staple, periurban, and tree crop systems of the humid and subhumid zones of west and central Africa

International Institute of Tropical Agriculture ,  [IITA root and tuber improvement program: staff papers 1977/78] ,  IITA root and tuber improvement program: staff papers 1977/78

International Institute of Tropical Agriculture ,  [IITA Crop Improvement Division: activity report and work plan 1993] ,  IITA Crop Improvement Division: activity report and work plan 1993

International Institute of Tropical Agriculture ,  [IITA Crop Improvement Division: activity report and work plan 1992] ,  IITA Crop Improvement Division: activity report and work plan 1992