Institution
Saxon State and University Library
35
University Library of Regensburg
23
Universitätsbibliothek der Humboldt-Universität zu Berlin
17
Bibliothèque Nationale et Universitaire de Strasbourg
7
Bavarian State Library
6
Library service of the University of Strasbourg
5
Zentralbibliothek Zürich
4
Research Library Olomouc
1