Libraries and Library Catalogs - World
- Major Indexes / Combined Catalogs
- Access to the combined resources of the national libraries of Europe
- LibDex: The Library Index - By Country
- Worldwide directory of library homepages and web-based OPACs.
- LIBWEB: Library Servers via WWW
- A master list of web servers for libraries around the world.
- National Library Catalogs Worldwide
- List maintained by the Library of the University of Queensland, Australia.
- Selected National, International, and Regional Catalogs
- European Library
- British Library Public Catalogue
- GVK - Gemeinsamer Bibliotheksverbund
- Union Catalogue of seven German states participating the Common Library Network (GBV)
- Karlsruher Virtueller Katalog
- Combined searching of selected German, Austrian and Swiss library catalogs, as well as many national and union catalogs
- Holdings of c. 300 Swedish Libraries