Online bibliographic research tools.

Biblioteca Amilcar Cabral Catalogue

Catalogue of books in the library (OPAC of the library hub of Bologna).

SBN UBO | Catalogue of the Library Hub of Bologna

Integrated catalogue which offers a search within the heritage of books, periodicals, multimedia material, e-books and electronic journals of all the libraries belonging to the Library Hub of Bologna.

OPAC SBN | Catalogue of the National Library Service

OPAC (Online Public Access Catalogue) provides access to the whole heritage of the National Library Service, the network of Italian libraries: 6,400 libraries throughout the country.

ACNP | Italian Catalogue of Periodicals

The catalogue originates from the National Collective Archive of Periodicals and contains magazines, newspapers and other periodicals: 250,000 titles covering all subject areas.

KVK | Karlsruhe Virtual Catalog

Search meta-catalogue, created in 1996 on the initiative of the Karlsruhe Institute of Technology library, which allows users to simultaneously search different types of international catalogues, digital collections, global catalogues and online book retailers.

The European Library

Multilingual portal offering access to the catalogues of national libraries in 45 European countries, querying over 168,238,832 bibliographic records including full-text books, periodicals and audio recordings. The site is no longer updated.

Library of Congress

Based in Washington, D.C., it is the national library of the United States of America and the largest library in the world. The catalogue allows users to browse over 150 million books, periodicals, manuscripts, maps, audio and music recordings, images and electronic resources.


With over 2 billion bibliographic records taken from libraries around the globe, WorldCat is the world's largest catalogue.