- The European Library
The European Library webservice is a portal which offers free access to the combined resources of the 45 national libraries of Europe. Highly recommended.
- OCLC WorldCat
This worldwide catalogue includes more than one billion items in more than 10,000 libraries. Highly recommended.
- European Commission Libraries Catalogue ECLAS
This is the European Commission Union Catalogue referencing holdings of a network of libraries. Material on European integration can be found here.
- World Affairs Online Database
Updated regularly, this is one of the largest bibliographical databases on social sciences in Europe, with more than 800,000 references to articles / chapters from periodicals and books, monographs, reports, and official publications.
- Libweb Library Servers via WWW
This website provides access to libraries in more than 70 countries worldwide.
The Library Index
A geographical index with links to world libraries and a library-type index.
- Karlsruher Virtual Catalog KVK
This service of the Karlsruhe University Library provides access to more than 75 million books and serials in library and booktrade catalogues worldwide.
- European Academy of Bozen OPAC
Literature about South Tyrol, and in the fields of applied linguistics, law, sociology, environmental sciences and management can be found here. The following library catalogues can be searched here from one user interface: European Academy Bozen, the library of the Free University of Bozen, and the library of the Philosophical-Theological College of Brixen.
- BUBL Link Catalogue
Internet subject searching
This handy subject guide to internet resources features abstract and catalogue record for each item, and links that are verified on a regular basis.