Institution
Bavarian State Library
80
University Library of Regensburg
25
Zentralbibliothek Zürich
14
Universitätsbibliothek der Humboldt-Universität zu Berlin
13
National Library of Sweden - Kungliga biblioteket
5
The Swiss National Library
2
Basel University Library
1
University Library of Greifswald
1
Bern University Library
1