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       Author Hayden, F.V. Full Title Drainage Map of Colorado. Topography by A.D. Wilson, G.R. Bechler, Henry Gannett, G.B. Chittenden and S.B. Ladd. Department of the Interior, U.S. Geological and Geographical Survey of the Territories, F.V. Hayden, U.S. Geologist in Charge. March 1877. Sheet II. Publisher Department of The Interior. United States Geological and Geographical Surveys of the Territories. Author Hayden, F.V. Full Title Central Colorado. U.S. Geological and Geographical Survey of the Territories. F.V. Hayden in Charge. A.D. Wilson, G.R. Bechler, H. Gannett and G.B. Chittenden, Topographical Assistants. Surveyed in 1874 & '75. Sheet VII. Publisher Department of The Interior. United States Geological and Geographical Surveys of the Territories. 
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