There are currently 14 libraries and library networks from all over Europe who co-operatively build up the database EROMM Classic and run the other EROMM Services. The EROMM partners collect records of their own and/or from libraries affiliated to them and send them on to the EROMM Secretariat for integration into the database.

• Biblioteca Nacional, Lisboa, Portugal bla * Bibliothèque cantonale et universitaire, Lausanne-Dorigny, Switzerland * Bibliothèque nationale de France, Paris, France * Bibliothèque Royale de Belgique / Koninklijke Bibliotheek van België, Brussels, Belgium * British Library, London, United Kingdom * ETH-Bibliothek, Zürich, Switzerland * Gemeinsamer Bibliotheksverbund - Verbundzentrale, Göttingen, Germany * Kansalliskirjasto, Helsinki, Finland * Det Kongelige Bibliotek, Kopenhagen, Denmark * Koninklijke Bibliotheek, ‘s-Gravenhage, The Netherlands * Kungliga biblioteket, Stockholm, Sweden * Národní knihovna Ceské republiky, Praha, Czech Republic * Niedersächsische Staats- und Universitätsbibliothek, Göttingen, Germany * Российская национальная библиотека, St. Petersburg, Russia