union catalog
combined library catalog describing the collections of a number of libraries
The European Library
web service providing access to resources of national libraries across Europe
National Collective Archive of Periodicals
website of the Italian catalogue of periodicals
E-Theses Online Service
bibliographic database of electronic PhD, MD and DProf theses provided by the British Library
North Rhine-Westphalian Library Service Centre
Organization in North Rhine-Westphalia
Library Hub Discover
union catalog operated by Jisc
Common Library Network
German Library cataloge union of different Librarys located in the federal states of Lower Saxony, Saxony-Anhalt, Thuringia, Hamburg, Bremen, Schleswig-Holstein, Mecklenburg-Vorpommern and Berlin
National Union Catalog
printed catalog of books catalogued by the Library of Congress and other American and Canadian libraries
Rigler-Deutsch Index
Union catalog / discography of U.S. holdings of 78 rpm records
Bavarian Library Network
German library association and union catalog
Judaica-Portal
academic search engine
Union List of Israel
online Bibliography Records
South-West German Library Network
German library association
Oxford Libraries Information System
former library catalogue of Oxford University