Content Provider
Biodiversity Heritage Library (BHL)
8
University of Washington, Seattle: Digital Collections
7
University of Miami: Digital Collections
5
GettDigital (Gettysburg College Digital Collections)
3
University of Michigan: Digital Collections
3
Villanova University Falvey Memorial Library: Villanova Digital Library
3
Hathi Trust Digital Library
2
The Portal to Texas History (University of North Texas)
2
Harvard University: Harvard Collections
1
Maine State Documents (Maine State Library)
1
The Library of Congress: American Memory
1
University of Florida: Digital Library Center
1
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
1