Content Provider
Unknown
1,629
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
74
David Rumsey Historical Map Collection (Cartography Associates)
61
University of Washington, Seattle: Digital Collections
58
The Library of Congress: American Memory
43
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
41
Washington State University: WSU Libraries Digital Collections
40
University of North Texas: UNT Digital Library
28
University of Calgary Journal Hosting
17
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
14
University of Massachusetts: ScholarWorks@UMass Amherst
14
Defense Technical Information Center: DTIC Technical Reports database
12
Oregon Digital (University of Oregon/Oregon State University)
11
UNESDOC - UNESCO Digital Library
11
USGS Science Data Catalog (via DataONE)
10
Athabasca University Digitization Portal
9
MSpace at the University of Manitoba
7
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
6
DataCite Metadata Store (German National Library of Science and Technology)
6
North Dakota State University (NDSU): Digital Horizons
6
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
6
University of Alberta: Era - Education and Research Archive
6
Hathi Trust Digital Library
5
The University of Chicago Library: Digital Collections
5
University of California: eScholarship
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
4
Arca (BC's Digital Treasures)
3
DRO - Deakin Research Online
3
Institut national des sciences de l'Univers: HAL-INSU
3
Montana State University (MSU): ScholarWorks
3
Peoples' Friendship University of Russia (RUDN): Open repository
3
Repositório do INPA
3
Tennessee Virtual Archive (TeVA - Tennessee State Library and Archives)
3
The University of Texas at Austin: Texas ScholarWorks
3
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
3
Aarhus University: Research
2
Australian National University: ANU Digital Collections
2
Carolina Digital Repository (UNC - University of North Carolina)
2
Colby College: DigitalCommons@Colby
2
DataCite
2
Digital Commons University of South Florida (USF)
2
Digital.CSIC (Spanish National Research Council)
2
Directory of Open Access Journals: DOAJ Articles
2
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2
Indiana University Libraries Digital Projects & Services
2
New Mexico Digital Collections (The University of New Mexico - UNM)
2
Open Parks Network
2
Research Center for Eco-Environmental Sciences: RCEES OpenIR (Chinese Academy of Sciences)
2
Research Data Australia (Australian National Data Service - ANDS)
2
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