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By Kenneth J. Zoll. Ken Zoll conducted a year-long study at the V-V Heritage Site outside of Sedona, Arizona, where the Sinaguas (early prehistoric people) left three huge stone panels of petroglyphs. Zoll's study was to watch the effect the changing seasons had on the petroglyphs the Sinaguas left. The results of the study, with photos of all events, are contained in a 90-page book, Sinagua Sunwatchers.
Softcover; 90 pages.
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