Biblioteche nazionali
(World) Le Biblioteche Nazionali in Internet (Alice.it)
(World) National Library Catalogues Worldwide (University of Queensland)
(World) WWW Accessible National Libraries of the World (IFLA)
Argentina. Biblioteca Nacional de la Repœblica Argentina
Canada. National Library of Canada
France. Biblioth*que nationale de France
France. Biblioth*que nationale de France. Catalogue
Germany. Die Deutsche Bibliothek
Italy. Biblioteca Nazionale Centrale di Firenze
Italy. Biblioteca Nazionale Centrale di Firenze. Search Form
Italy. Biblioteca Nazionale Centrale di Roma
Mexico. Biblioteca Nacional de M*xico
Spain. Biblioteca Nacional de Espa—a
United Kingdom. The British Library
United Kingdom. The British Library. Public Catalog
United States. Library of Congress
United States. Library of Congress. Catalog
Vatican State. Biblioteca Apostolica Vaticana
Biblioteche universitarie
Belgium. Universit* de Louvain-La-Neuve
Italy. Universitˆ degli Studi di Roma "La Sapienza"
Italy. Universitˆ di Bologna (Almatel)
Mexico. UNAM - Universidad Nacional Aut–noma de M*xico
Spain. Universidad Complutense de Madrid
Spain. Universidad de Navarra
United Kingdom. Cambridge University
United Kingdom. Oxford University
United Kingdom. University of London
United States. Columbia University
United States. Harvard University
United States. University of California. Melvyl System
Unites States. University of Notre Dame
United States. Yale University
Cataloghi collettivi
(World). Karlsruhe Virtual Catalog
(World) MultiOpac (Sebastiano Mid˜lo)
France. Catalogue Collectif de France
Italy. ICCU - Edit 16 - Censimento delle edizioni italiane del XVI secolo
Italy. ICCU - Istituto Centrale per il Catalogo Unico. Web Catalog
Italy. MAI - MetaOPAC Azalai Italiano
Italy. URBE - Unione Romana Biblioteche Ecclesiastiche
Italy and Vatican State. URBS - Unione Romana Biblioteche Scientifiche
Spain. Bibliotecas Pœblicas del Estado
Spain. Cat‡logo Colectivo del Patrimonio Bibliogr‡fico Espa—ol
Spain. REBIUN - Red de Bibliotecas Universitarias Espa—olas
United Kingdom. CURL/OPAC
Altri
Italy. Biblioteca Ambrosiana
Spain. CSIC. Red de Bibliotecas
United States. New York Public Library