Single Catalogue of the Collaborative Network of Academic Libraries
Electronic Catalogue of the National Library of Greece.
World Collective Library Catalogue.
Wordcat is a bibliographic database and unified catalogue of collections from country libraries which are members of the OCCLC organization. It contains over 330 million records, which are associated with over 2 billion physical and digital objects in 485 languages, and is offered free of charge in libraries.
Global Library Catalogue with additional searchability by country.
