Content Provider
University of Washington, Seattle: Digital Collections
6
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
3
The Portal to Texas History (University of North Texas)
3
Biodiversity Heritage Library (BHL)
2
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
2
Villanova University Falvey Memorial Library: Villanova Digital Library
2
Freiburg University Library: Freiburger historische Bestände - digital
1
GettDigital (Gettysburg College Digital Collections)
1
Harvard University: Harvard Collections
1
Hathi Trust Digital Library
1
Illinois State Library: Illinois Digital Archives
1
The Library of Congress: American Memory
1
University of North Carolina: UNC Digital Collections
1