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Mejia Gutierrez, M ,  [Orinoquia colombiana: sabanas de la altillanura: clima y uso de la tierra] ,  Orinoquia colombiana: sabanas de la altillanura: clima y uso de la tierra

Stephan, Aline ,  [Contribution a l'étude des usages des sols des versants andins : Dans la cordillère centrale colombienne, Département du Cauca] ,  Contribution a l'étude des usages des sols des versants andins : Dans la cordillère centrale colombienne, Département du Cauca

International Center for Tropical Agriculture ,  [Integrated soil fertility management in the tropics: TSBF-CIAT's strategy and work plan, 2002-2005] ,  Integrated soil fertility management in the tropics: TSBF-CIAT's strategy and work plan, 2002-2005

International Center for Tropical Agriculture ,  [Cassava Program 1987-1991] ,  Cassava Program 1987-1991

Henry, Guy ,  Howeler, Reinhardt H. ,  [Cassava in China in an era of change: a CBN case study with farmers and processors] ,  Cassava in China in an era of change: a CBN case study with farmers and processors

Hershey, Clair H. ,  [Eco-Efficiency: from vision to reality] ,  Eco-Efficiency: from vision to reality

Cramb, R.A. ,  Gray, G.D. ,  Gummert, M. ,  Haefele, SM ,  Lefroy, R.D.B. ,  Newby, Jonathan C. ,  Stür, Werner W. ,  Warr, P. ,  [Trajectories of rice-based farming systems in mainland Southeast Asia] ,  Trajectories of rice-based farming systems in mainland Southeast Asia