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Primary view of McAllen Ranch Quadrangle
Geological Survey (U.S.)
1975
Primary view of Bentsen Ranch Quadrangle
Geological Survey (U.S.)
1975
Primary view of Santa Elena Southeast Quadrangle
Geological Survey (U.S.)
1975
Primary view of La Reforma Quadrangle
Geological Survey (U.S.)
1975
Primary view of San Isidro Quadrangle
Geological Survey (U.S.)
1975
Primary view of Mission Quadrangle
Geological Survey (U.S.)
1975
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