Institution
Bavarian State Library
18
Bibliothèque Nationale et Universitaire de Strasbourg
6
Library of the Academy of Sciences of the Czech Republic
6
Universitätsbibliothek der Humboldt-Universität zu Berlin
3
University Library of Regensburg
2
Library service of the University of Strasbourg
2
Zentralbibliothek Zürich
2
Basel University Library
1
Saxon State and University Library
1