Éditeur(s) : International Maize and Wheat Improvement Center International Maize and Wheat Improvement Center ( México D.F. México )
Résumé : (Bibliography) Includes bibliographical references.
(Statement of Responsibility) Juan Carlos Martínez, José Román Arauz.
"A pratial version of this report was presented as an invited paper in the Farming Systems Research Symposium, Kansas State University, November 21-23, 1982."
(Funding) CIMMYT economics program working paper ;
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