This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MEXICO CITY (AP) — A prehistoric human ...
Canal irrigation in prehistoric Mexico : the sequence of technological change / William E. Doolittle
Flyer introducing the new title from the publisehr inserted. NMAI copy 39088019918663 from the library of H. Paul and Jane R. Friesema. Prehistoric farmers in Mexico invented irrigation, developed it ...
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