Catalogue of the TIB/UB Hannover : TIBORDER-Online
The comprehensive holdings of physics literature of the TIB Hannover, the German National Library of Science and Technology, can be searched by TIBORDER-Online. The required literature may be ordered directly online.

Karlsruhe Virtual Catalog : KVK
The Karlsruhe Virtual Catalog allows a parallel search in numerous library catalogues via WWW. So libraries holding the needed literature can be located more easily. Usually individual articles are not indexed. Searching by subject is possible, but often results in a very high number of hits when put too general.