I thought the attached article might be interesting to folks.
Jud
---
Dr. Judson L. Ahern
Professor Emeritus, Geophysics
School of Geology & Geophysics
University of Oklahoma
Norman, OK 73019
[log in to unmask] W5JA
########################################################################
To unsubscribe from the CUBA-L list, click the following link:
http://lists.ou.edu/cgi-bin/wa?SUBED1=CUBA-L