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Primary view of Plano Quadrangle
Geological Survey (U.S.)
1980
Primary view of Plano Quadrangle
Geological Survey (U.S.)
1980
Primary view of Farmersville Quadrangle
Geological Survey (U.S.)
1980
Primary view of Farmersville Quadrangle
Geological Survey (U.S.)
1980
Primary view of Josephine Quadrangle
Geological Survey (U.S.)
1985
Primary view of Anna Quadrangle
Geological Survey (U.S.)
1985
Primary view of Frisco Quadrangle
Geological Survey (U.S.)
1981
Primary view of Frisco Quadrangle
Geological Survey (U.S.)
1982
Primary view of Frisco Quadrangle
Geological Survey (U.S.)
1982
Primary view of Hebron Quadrangle
Geological Survey (U.S.)
1981
Primary view of Addison Quadrangle
Geological Survey (U.S.)
1981
Primary view of Hebron Quadrangle
Geological Survey (U.S.)
1982
Primary view of Hebron Quadrangle
Geological Survey (U.S.)
1982
Primary view of Addison Quadrangle
Geological Survey (U.S.)
1982
Primary view of Addison Quadrangle
Geological Survey (U.S.)
1986
Primary view of Rowlett Quadrangle
Geological Survey (U.S.)
1984
Primary view of Rowlett Quadrangle
Geological Survey (U.S.)
1984
Primary view of Garland Quadrangle
Geological Survey (U.S.)
1986
Primary view of McKinney
Geological Survey (U.S.)
1985
Primary view of Dallas
Geological Survey (U.S.)
1986
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