24 maio 1869 ano - John Wesley Powell's First Expedition of the Colorado River

Descrição:

EXPLAIN:
what the expedition was
What he found archaeology
Bureau of Ethnology
What this meant to archaeology in GC
copies of journals (pages or transcripts)
Pictures of journey - esp any with NA and arch
http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/powell-john.pdf

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