Institution
University Library of Regensburg
18
Universitätsbibliothek der Humboldt-Universität zu Berlin
9
Bavarian State Library
5
University of Graz
2
University Library Salzburg
2
University and Regional Library of Tyrol
2
University Library of Greifswald
1
National Library of Sweden - Kungliga biblioteket
1
Zentralbibliothek Zürich
1