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1
Austin : Bureau of Economic Geology, University of Texas at Austin, 1973

Map
2
Austin : Bureau of Economic Geology, University of Texas at Austin, 1976

Map
3
Austin : Bureau of Economic Geology, University of Texas at Austin, 1976

Map
4
Austin : Bureau of Economic Geology, University of Texas at Austin, 1976

Map
5
Austin : Bureau of Economic Geology, University of Texas at Austin, 1977

Map
6
Austin : Bureau of Economic Geology, University of Texas at Austin, 1976

Book
7
Austin : University of Texas at Austin, 1972

Map