Collective Registry
Austria - Gesamtkatalog
U.S.A. - Melvyl (The Catalog of the University of California Libraries)
United Kingdom - Copac academic and national library catalogue
France - CCFR, Catalogue collectif de France
Italy - ICCU, Istituto Centrale per il Catalogo Unico
Spain - Catálogo BN (Biblioteca National de Espana)
Switzerland - Schweizer Virtueller Katalog
Germany - Karlsruher Virtueller Katalog
U.S.A. - Gateway to Library Catalogs (a page from the Library of Congress)
National Registries
Austria - Österreichische Nationalbibliothek
Australia - National Library of Australia
U.K. - British Library
France - Bibliotheque National de France
Holland - Koninklijke Bibliotheek
Italy - Biblioteca Nazionale Centrale di Roma
Scotland - National Library of Scotland
Spain - Biblioteca Nacional de España
Switzerland- Schweizerische Nationalbibliothek NB
Wales - National Library of Wales
Germany - Die Deutsche Nationalbibliothek
Other Libraries
European National Libraries - The European Library
Cultural collections of Europe - Europeana
Libraries classified by countries (a page from the University of Berkeley) - Libweb
