Content Provider
Hathi Trust Digital Library
38
Unknown
37
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
27
DataCite Metadata Store (German National Library of Science and Technology)
25
University of New England: DUNE (DigitalUNE)
16
University of Michigan: Digital Collections
11
Harvard University: Harvard Collections
9
University of the Pacific, McGeorge School of Law: Scholarly Commons
8
University of the Pacific: Scholarly Commons
8
Portland Public Library: Digital Commons
7
American Museum of Natural History: AMNH scientific publications
6
Project Gutenberg (PG)
5
Defense Technical Information Center: DTIC Technical Reports database
4
The Online Books Page (Penn Libraries, University of Pennsylvania)
4
Villanova University Falvey Memorial Library: Villanova Digital Library
4
North Dakota State University (NDSU): Digital Horizons
3
PubMed Central (PMC)
3
Washington State University: WSU Libraries Digital Collections
3
BioOne Online Journals
2
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
2
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
2
HighWire Press (Stanford University)
2
TCU Digital Repository (Texas Christian University)
2
The University of Maine: DigitalCommons@UMaine
2
University of Illinois at Urbana-Champaign: UIUC Digitized Books
2
University of Miami: Digital Collections
2
Érudit.org (Université Montréal)
2
Bath Spa University: ResearchSPAce
1
Digital Commons@Butler University
1
DigitalCommons@Liberty University (Lynchburg, VA)
1
Hunter Library Digital Collections (Western Carolina University)
1
Research Commons Kutztown University
1
University of Massachusetts: ScholarWorks@UMass Amherst
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
University of New Hampshire: Scholars Repository
1
University of North Florida (UNF): Digital Commons
1
University of Pennsylvania: A Celebration of Woman Writers
1
University of Pennsylvania: ScholaryCommons@Penn
1
Western Kentucky University (WKU): TopScholar
1