National and international catalogues
ICCU - OPAC Indice Servizio Bibliotecario Nazionale
This OPAC allows you to query the SBN Index and the catalogue of the libraries that form part of it.
ACNP - Catalogo Italiano dei Periodici
The catalogue originates from the Archivio Collettivo Nazionale dei Periodici ('Italian National Archive of Periodicals') and contains bibliographic descriptions of the periodical publications owned by libraries right across the country, covering all subject areas.
IKarlsruher Virtueller Katalog
A meta catalogue that queries the catalogues of libraries and bookstores around the world, for a total of more than 500 million titles. Its special feature is the ability to search across multiple catalogues simultaneously.