John Wesley Powell Collection
 
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1Exploration of the Colorado River of the West and Its Tributaries Explored in 1869, 1870, 1871, and 1872, Under the Direction of the Secretary of the Smithsonian Institution.1875Text
2Scientific American Supplement, No. 118, April 6, 18781878-04-06Text
3Scientific American Supplement, Vol V, No. 1211878-04-27Text
4Scientific American Supplement, Vol. V, No. 1241878-05-18Text
5Scientific American Supplement, Vol. VI, No. 131.1878-07-06Text
6Scientific American Supplement, Vol. VI., No. 1351878-08-03Text
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