KVK - Karlsruher Virtueller Katalog
Search in different German union catalogs as well as in international library catalogs.
ZDB - Zeitschriftendatenbank
The German Union Catalog of Serials (ZDB) is one of the world’s largest databases for journals, newspapers, monographic series and other serial publications from all countries, in all languages, in printed, electronic or digitised form.
Deutsche Digitale Bibliothek
The German Digital Library: search culture and knowledge online, including the German Newspaper Portal with historical newspapers.
