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1by Ryan, J.G. (ed.), International Workshop on Socioeconomic Constraints to Development of Semi-Arid Tropical Agriculture eng 19-23 Feb 1979 Hyderabad (India), 163993 International Crops Research Inst. for the Semi-Arid Tropics, Patancheru (India) eng, Thompson, H.L. (ed.)
Published 1980Texto bibliotecaFAO IT