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Primary view of Lakeside Village Quadrangle
Geological Survey (U.S.)
1968
Primary view of Itasca Quadrangle
Geological Survey (U.S.)
1968
Primary view of Blum Quadrangle
Geological Survey (U.S.)
1968
Primary view of Hillsboro West Quadrangle
Geological Survey (U.S.)
1968
Primary view of Hillsboro East Quadrangle
Geological Survey (U.S.)
1968
Primary view of Covington Quadrangle
Geological Survey (U.S.)
1968
Primary view of Blanton Quadrangle
Geological Survey (U.S.)
1968
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