Institution
University Library of Regensburg
137
Universitätsbibliothek der Humboldt-Universität zu Berlin
112
Bavarian State Library
45
Basel University Library
3
The Swiss National Library
3
Zentralbibliothek Zürich
3
Bern University Library
2
University Library of Greifswald
1
University of Graz
1
University and Regional Library of Tyrol
1