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8. Colorado, Denver quadrangle

Maps University Of Minnesota Public content
1901. Geological Survey (U.S.). Relief shown by contours.; "Reconnaissance map."; "Survey in 1888."; "Engraved Oct 1891 by U.S.G.S."; Shows roads, and railroads.; Text on verso. 4... The Survey (Washington, D.C).

9. Colorado, Manitou quadrangle

Maps University Of Minnesota Public content
1909. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Control by Coast and Geodetic Survey."; "Surveyed in 1906-1907. Edition of May 1909, reprinted 1921. A... The Survey (Washington).

10. Denver Mountain Parks, Colo

Maps University Of Minnesota Public content
1924. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Surveyed in 1903 and 1923."; "State of Colorado, William E. Sweet, Governor ..." on sheet 59 x 84 cent... The Survey (Washington, D.C).