Luis M. Barreda
Bureau of Economic Geology
The University of Texas at Austin
University Station, Box X
Austin, Texas 78713-8924 E-mail: barredal@beg.utexas.edu Telephone: 307-527-9389 Fax: 512-471-0140
The University of Texas at Austin
University Station, Box X
Austin, Texas 78713-8924 E-mail: barredal@beg.utexas.edu Telephone: 307-527-9389 Fax: 512-471-0140