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x Geological surveys
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x Photographs showing landscapes, geological and other features of portions of the western territory of the United States, obtained in connection with geographical and geological explorations and surveys west of the 100th meridian, seasons of 1871, 1872 and 1873
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25 results found for: x Colorado River (Colo.-Mexico)
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x Collection: Photographs showing landscapes, geological and other features of portions of the western territory of the United States, obtained in connection with geographical and geological explorations and surveys west of the 100th meridian, seasons of 1871, 1872 and 1873
x Topic: Geological surveys