Proceedings 45 Congreso Internacional de Americanistas, International Congress of Americanists, Bogotá, Columbia, 1985  Part 1.  Pre-Hispanic agricultural fields in the Andean region / 
edited by William M. Denevan, Kent Mathewson, and Gregory Knapp. 
 - Oxford :  B. A. R.,  1987 
 - BAR.  359i .
 - British archaeological reports international series ;  359 (1) .
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