SWB - Südwestdeutscher Bibliotheksverbund

SWB: Union catalogue of libraries from Baden-Württemberg, Saarland and Saxony.

KVK - Karlsruher Virtual Catalogue

KVK: Parallel simultaneous search in German and international network library catalogues.

ZDB - Zeitschriftendatenbank

ZDB: The ZDB is the largest database for newspaper and journal title and ownership information.

It includes printed and electronic media.