- Zeitschriftendatenbank (ZDB)
Title index of periodical holdings - in printed or electronic form - in German libraries.
- hbz union catalogue
Union catalogue of libraries in North Rhine-Westphalia.
Holdings of over 10,000 libraries worldwide.
- KVK - Karlsruher Virtueller Katalog
Searches simultaneously - in a metasearch - the catalogues of numerous German and foreign libraries and library networks.
- Catalogue of the Paderborn City Library
- Catalogue of the Archbishop's Academic Library Paderborn, the Johann-Adam-Möhler-Institute for Ecumenics and the Reference Library at the Faculty of Theology
- Catalogue of the Media Centre of the Archdiocese of Paderborn
- Union catalogue of the libraries of the Detmold University of Music and the Detmold/Paderborn Musicology Seminar
- Catalogue of the library of the Catholic University of North Rhine-Westphalia