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International Institute of Tropical Agriculture ,  [IITA Annual Report 1977] ,  IITA Annual Report 1977

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

Lal, R. ,  [Soil erosion problems on an alfisol in western Nigeria and their control: IITA monograph No. 1] ,  Soil erosion problems on an alfisol in western Nigeria and their control: IITA monograph No. 1

International Institute of Tropical Agriculture ,  [Le point de la recherche a l IITA 1978] ,  Le point de la recherche a l IITA 1978

International Institute of Tropical Agriculture ,  [IITA Research highlights 1978] ,  IITA Research highlights 1978

International Institute of Tropical Agriculture ,  [IITA Annual Report 1983] ,  IITA Annual Report 1983

Ngambeki, D. ,  Wilson, G.F. ,  [Economic and onfarm evaluation of alley cropping with Leucaena Leucocephala: 1980-1983 activity consolidated report] ,  Economic and onfarm evaluation of alley cropping with Leucaena Leucocephala: 1980-1983 activity consolidated report

Hartmans, E.H. ,  [Land development and management in tropical Africa] ,  Land development and management in tropical Africa

International Institute of Tropical Agriculture ,  [IITA Annual Report 1971] ,  IITA Annual Report 1971

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