1
2
3
4
5
6
7
8
10
11
द्वारा Henry, Christopher D.
[Reston, Va.?] : U.S. Geological Survey, 1984
“...University of Texas at Austin. Bureau of Economic Geology...”[Reston, Va.?] : U.S. Geological Survey, 1984
सरकारी दस्तावेज
नक्शा
12
14
द्वारा Senger, Rainer K.
Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1987
“...University of Texas at Austin. Bureau of Economic Geology...”Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1987
सरकारी दस्तावेज
पुस्तक
15
16
द्वारा Ruppel, Stephen C.
Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1988
“...University of Texas at Austin. Bureau of Economic Geology...”Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1988
सरकारी दस्तावेज
पुस्तक
17
18
द्वारा Woodruff, C. M.
Washington, D.C. : U.S. Dept. of Energy, 1979
“...University of Texas at Austin. Bureau of Economic Geology...”Washington, D.C. : U.S. Dept. of Energy, 1979
पुस्तक
19
20
द्वारा Tyler, Noel
Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1985
“...University of Texas at Austin. Bureau of Economic Geology...”Austin, Tex. : Bureau of Economic Geology, University of Texas at Austin, 1985
सरकारी दस्तावेज
पुस्तक