Institution
University Library of Regensburg
33
Universitätsbibliothek der Humboldt-Universität zu Berlin
23
Bavarian State Library
10
University Library of Greifswald
6
Bern University Library
6
Basel University Library
4
Saxon State and University Library
3
Zentralbibliothek Zürich
2
University of Graz
1
The Swiss National Library
1
University and Regional Library of Tyrol
1