Bib Utilities access page:
http://lcweb.loc.gov/coll/nucmc/utility.html

National Union Catalog of Manuscripts
http://www.loc.gov/coll/nucmc/nucmc.html

British National Bibliography
http://www2.eins.org/databases/shortinfoBNBD.htm

Bibliotechque National de Francaise
http://www.bnf.fr/site_bnf_eng/index.html

FirstSearch (WorldCAt)
http://newfirstsearch.oclc.org/

Books in Print
http://www.globalbooksinprint.com/GlobalBooksInPrint/
(might have to use proxy server)

Bowker’s Free Publisher’s Web pages
http://www.globalbooksinprint.com/php/default.asp

ABPR, Inter Books in Print + others
http://www.bowker.com/bowkerweb/catalog2001/prod00031.htm