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Primary view of Horsehead Canyon Quadrangle
Geological Survey (U.S.)
1970
Primary view of Sheffield Southeast Quadrangle
Geological Survey (U.S.)
1970
Primary view of Sheffield Northwest Quadrangle
Geological Survey (U.S.)
1970
Primary view of Dead Man Canyon Quadrangle
Geological Survey (U.S.)
1970
Primary view of Fort Lancaster Quadrangle
Geological Survey (U.S.)
1970
Primary view of Sheffield Quadrangle
Geological Survey (U.S.)
1970
Primary view of Del Rio
Geological Survey (U.S.)
1970
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