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Filters: Tags: Anthracite (X) > partyWithName: U.S. Geological Survey (X)

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    map background search result map search result map USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1888 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1894 USGS 1:62500-scale Quadrangle for Anthracite, CO 1889 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1888 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1894 USGS 1:62500-scale Quadrangle for Anthracite, CO 1889 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893 USGS 1:62500-scale Quadrangle for Anthracite, CO 1893