Results of interlaboratory comparison of fission-track ages for the 1992 fission track workshop : Miller, Donald S., Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180, Crowley, Kevin D., Geology Department, Miami University, Oxford, OH 45056, DOKKA, Roy K., Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803 Galbraith, R.F., Department of Statistical Science, University College London, London, WC1E 6BT United Kingdom, Kowallis, Bart J., Department of Geology, Bringham young University, Provo, UT 84602. Naeser, Charles W., U.S. Geological Survey, Federak Center, Box 25046, Bldg. 21 MS 424, Denver, CO 80225