Institution
Bavarian State Library
1,078
Zentralbibliothek Zürich
705
University Library of Regensburg
50
Basel University Library
37
Bern University Library
28
Universitätsbibliothek der Humboldt-Universität zu Berlin
8
University of Graz
1
The Swiss National Library
1
Saxon State and University Library
1
University Library Salzburg
1