The GVK multimaterial bibliographic database covers the holdings of over 32.7 million records of more than 400 GBV member and associated libraries with over 70.7 million separate catalogue entries of books, conference proceedings, periodicals, dissertations, microfilms and electronic resources. The periodicals of all subito-supplying libraries and other university libraries from Germany are also integrated. Access is free of charge. Books with EoD-Button are available for the eBook and Print on Demand-Service.