Richard,
I believe the Mill Valley address is no longer current. Their
present address is as follows:
University Science Books
55D Gate Five Road Sausalito, California 94965
(415) 332-5390
A useful URL is the USNO Almanacs page which has a link to the
Explanatory Supplement that can be ordered online for $65.
http://riemann.usno.navy.mil/AA/publications/docs/almanacs.html
Regards,
Luke Coletti
Richard M. Koolish wrote:
> After being out of print for many years, the Explanatory Supplement
> was re-written and re-published in 1992. It is now the
> Explanatory Supplement to the Astronomical Almanac, edited by
> Kenneth Seidelmann and is published by University Science Books,
> 20 Edgehill Rd, Mill Valley, CA 94941.
