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54. Topographic map of Colorado, 1913

Maps University Of Minnesota Public content
1913. George, Russell D., 1866-. Relief shown by contours and gradient tints.; Includes diagr. showing relation of Colorado to International map of the world and insets of "Canon C... Colorado State Geological Survey (Boulder, Colo).

56. Uncompahgre Irrigation Project, Colorado

Maps University Of Minnesota Public content
1929. United States. Bureau of Reclamation. Relief shown by contours.; Prepared in the Washington office, J.H. Pellan, chief draftsman.; Includes text. 29 x 24 Centimeters Scale approximately... U.S. Bureau of Reclamation (Washington, D.C).