Institution
University Library of Regensburg
56
Bavarian State Library
47
Universitätsbibliothek der Humboldt-Universität zu Berlin
28
Basel University Library
15
Bern University Library
11
University Library of Greifswald
5
The Swiss National Library
2
Zentralbibliothek Zürich
2
Library Am Guisanplatz
1
University of Graz
1