STRUCTURE AT THE TOP AND BOTTOM OF THE MANTLE
(Department of Earth and Planetary Sciences,
Harvard University, Cambridge, MA 02138-2902,
e-mail liu@seismology.harvard.edu)
This paper is published in the book
Monitoring a Comprehensive Test Ban Treaty,
521-550, 1996 Kluwer Academic Publishers. It describes two new models
S20/U7L5 and SKS12/WM13 studied by Harvard. You can request a reprint by
contacting Professor
Dziewonski or Ekstrom .