William E. Doolittle
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The Safford Valley Grids
The University of Arizona Press
Crisscrossing Pleistocene terrace tops and overlooking the Gila River in southeastern Arizona are acres and acres of rock alignments that have perplexed archaeologists for a century. Well known but poorly understood, these features have long been considered agricultural, but exactly what was cultivated, how, and why remained a ...
Pre-Hispanic Occupance in the Valley of Sonora, Mexico
Archaeological Confirmations of Early Spanish Reports
The University of Arizona Press
