Content Provider
The Portal to Texas History (University of North Texas)
31
Harvard University: Harvard Collections
10
Australian National University: ANU Digital Collections
8
University of Washington, Seattle: Digital Collections
8
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
6
Knowledge Network for Biocomplexity (via DataONE)
4
TCU Digital Repository (Texas Christian University)
3
The Library of Congress: American Memory
3
The University of Melbourne: Digitised Collections
3
University of Michigan: Digital Collections
3
Unknown
3
Dryad Digital Repository (Duke University)
2
University of Miami: Digital Collections
2
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
2
Defense Technical Information Center: DTIC Technical Reports database
1
Directory of Open Access Journals: DOAJ Articles
1
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
1
National Library of Australia: Digital Collections
1
The Canadian Field-Naturalist (E-Journal)
1
University of North Carolina: UNC Digital Collections
1
Villanova University Falvey Memorial Library: Villanova Digital Library
1