Incoming Resources
- U.S. Department of the Interior, U.S. Geological Survey, Austin, Tex.?, 2000
- Research and Development Center for Teacher Education, University of Texas at Austin, Austin, Tex.?, 1981
- SPECS, Inc., National Aeronautics and Space Administration, Austin, Tex.?, Washington, D.C., 1990
- Texas Parks and Wildlife, U.S. Department of the Interior, Fish and Wildlife Service, Southwestern Region, Austin, Tex.?, Albuquerque, N.M., 1997
- U.S. Department of the Interior, U.S. Geological Survey, Austin, Tex.?, 2000?