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International Institute of Tropical Agriculture ,  [IITA Annual Report 1979] ,  IITA Annual Report 1979

International Institute of Tropical Agriculture ,  [IITA Research Highlights 1982] ,  IITA Research Highlights 1982

International Institute of Tropical Agriculture ,  [IITA Annual Report 1981] ,  IITA Annual Report 1981

International Institute of Tropical Agriculture ,  [IITA Research Highlights 1984] ,  IITA Research Highlights 1984

International Institute of Tropical Agriculture ,  [IITA Annual Report 1974] ,  IITA Annual Report 1974

International Institute of Tropical Agriculture ,  [IITA Annual Report 1975] ,  IITA Annual Report 1975

International Institute of Tropical Agriculture ,  [IITA Annual Report 1972-73] ,  IITA Annual Report 1972-73

International Institute of Tropical Agriculture ,  [IITA Annual Report and Research Highlights 1986] ,  IITA Annual Report and Research Highlights 1986

International Institute of Tropical Agriculture ,  [IITA medium-term plan 1989-1993] ,  IITA medium-term plan 1989-1993

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