Blackhawk, Colorado U.S.G.S. quadrangle. 1906-1916.

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Blackhawk, Colorado U.S.G.S. quadrangle. 1906-1916.

2 maps.

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SNAC Resource ID: 7474638

Boulder Public Library

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Geological survey (U.S.)

http://n2t.net/ark:/99166/w6wd7pcw (corporateBody)

E.W. Glafcke was in charge of a crew during the United States Geological Survey's spirit leveling activities in Wyoming and Utah from 1896 to 1912. From the guide to the United States Geologic Survey photograph collection, 1892-1912, 1898-1902, (Utah State University. Special Collections and Archives) First organized as a branch in 1889, the Topographic Division was established in 1947. From the description of Records of the Topographic Division. (Unknown). World...