http://catalog.loc.gov/

http://catalog.loc.gov/webvoy.htm

http://www.loc.gov/index.html

http://www.loc.gov/catdir/catdir.html

http://en.wikipedia.org/wiki/Library_of_Congress_catalog_scheme

http://library.ucr.edu/?view=departments/cataloging/tools

http://product.half.ebay.com/_W0QQprZ507537

http://www.library.jhu.edu/catalogs/index.html

http://shopping.yahoo.com/p:Catalogue%20of%20Books%20Added%20to%20the%20Library%20of%20Congress%20from%20December%201,%201869,%20to%20December%201,%201870.::3005404168

http://www.librarything.com/catalog.php

http://www.lib.niu.edu/1999/il9904250.html

http://library.las-cruces.org/cataloging/