M. G. Kivelson, and P. J. Coleman, Jr.
Department of Earth and Space Sciences and
Institute of Geophysics and Planetary Physics
University of California, Los Angeles
L. F. Bargatze, K. K. Khurana, and R.
J. Walker
Institute of Geophysics and Planetary Physics
University of California, Los Angeles
D. J. Southwood
Institute of Physics, Imperial College of Science,
Technology, and Medicine, London.
Science, Vol. 261, Pages 331-334, July 16, 1993
Copyright © 1993 by the American Association for the Advancement of Science