ISBN Check  
   Form for checking International Standard Book Numbers for correct length, format, checksums and check digits.
   http://www.isbn-check.com/

Web World of Authority Control  
   Bibliography listing that includes tools, thesauri, Library of Congress sites, articles, workshops, journals, ALA committees, listservs, libraries, and vendors that deal with authority control or may be helpful in establishing authorities. This list is an
   http://www.lib.byu.edu/dept/catalog/authority/

Authority Tools for Audio-Visual Catalogers  
   Annotated list of online and print resources which have proven useful in performing authority control for audiovisual materials.
   http://ublib.buffalo.edu/libraries/units/cts/olac/capc/authtools.html

Library of Congress Authorities  
   Includes subject, name, title and name/title authority records created by or for the Library of Congress. Permits free downloading in MARC format.
   http://authorities.loc.gov/

Authority Control: A Basic Glossary of Terms  
   A glossary of terms used when discussing authority control. Provided by staff at the University of Buffalo Libraries.
   http://ublib.buffalo.edu/libraries/units/cts/ac/def.html

Catalog of Uncataloged Titles  
   Service that helps you locate information not usually cataloged in bibliographic sources that may contain the information you need. View a record that includes contact information for the publisher and cost.
   http://www.sapphirepress.com/UNCAT/

Authority Control in the 21st Century  
   Conference proceedings of an invitational conference held by OCLC March 31 - April 1, 1996. Includes full-text of the papers presented at the conference.
   http://digitalarchive.oclc.org/da/ViewObject.jsp?objid=0000003520&reqid=354

The Union List of Artist Names  
   The ULAN currently contains some 200,000 names representing approximately 100,000 individual artists (or "creators," including performance artists, and decorative artists) and architects, cumulated from nine participating Getty documentation pro
   http://www.getty.edu/research/conducting_research/vocabularies/ulan/index.html