John,
I'm a bit late in catching up with the mail!
You seem to know a bit about the Internet so I have to ask why you
didn't search for stuff about Jurgen Stock yourself?  Even if you don't
have access, you can always use the public library.
I got on www.aas.org (the American Astronomical Society) and
www.intastun.org (the International Astronomical Union).  The AAS's web
site has a link to a bibliographical search engine at Harvard U.  I
found his most recent paper with W. Jeanette Stock as primary author
dated from 1995 so Jurgen is still publishing.  These searches are only
for the largest journals.  The IAU site has a complete address and
phone listing for its members.  Why don't you write him with your
questions?  He's at:  Dr. Jurgen D. Stock, CIDA, Box 264, Merida 5101A
Venezuela.  E-mail at:  stock@cida.ve or stock@milkyway.cc.fc.ul.pt if
you prefer.
You stated that all of Stock's "clusters" are bogus.  How about Stock
23?  Ever heard of that one?  I'd think so!
Saul
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