Institution
Bern University Library
10
Basel University Library
9
Zentralbibliothek Zürich
7
Universitätsbibliothek der Humboldt-Universität zu Berlin
6
Library Am Guisanplatz
5
University Library of Regensburg
4
Bavarian State Library
3
University Library of Greifswald
3
The Swiss National Library
3
University of Graz
1