1. Graduate Student, Dept. of Engineering Geology, Lund Univ., P. O. Box 118, SE-22100 Lund, Sweden.
2. Assistant Scientist, Geophysics, Kansas Geological Survey, Univ. of Kansas, 1930 Constant Avenue, Lawrence, KS 66047-3726.
3. Associate Professor, Dept. of Engineering Geology, Lund Univ., P. O. Box 118, SE-22100 Lund, Sweden.
4. Associate Scientist, Geophysics, Section Chief, Kansas Geological Survey, Univ. of Kansas, 1930 Constant Avenue, Lawrence, KS 66047-3726.