Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
83
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
30
Open Parks Network
30
The University of Utah: J. Willard Marriott Digital Library
29
University of Lethbridge Digitized Collections
29
NOAA NCEI Environmental Data Archive (via DataONE)
16
University of Michigan: Digital Collections
16
North Dakota State University (NDSU): Digital Horizons
14
The Library of Congress: American Memory
11
Zenodo
10
Hunter Library Digital Collections (Western Carolina University)
8
Brigham Young University (BYU): Digital Collections
7
Unknown
7
Gulf of Alaska Data Portal (via DataONE)
6
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
6
Arctic Data Center (via DataONE)
5
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
5
Oklahoma State University: Digital Collections @ OKSTATE Library
4
Washington State University: WSU Libraries Digital Collections
4
oURspace - The University of Regina's Institutional Repository
4
University of New Brunswick: Centre for Digital Scholarship Journals
3
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre)
2
Cambridge University Press
2
Defense Technical Information Center: DTIC Technical Reports database
2
HighWire Press (Stanford University)
2
Loyola University Chicago Digital Special Collections
2
NASA Technical Reports Server (NTRS)
2
National Research Council Canada: NRC Publications Archive
2
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
2
ScienceDirect (Elsevier - via Crossref)
2
Theses Canada/Thèses Canada (Library and Archives Canada)
2
University of Alberta: Journal Hosting
2
University of British Columbia: cIRcle - UBC's Information Repository
2
University of Calgary Journal Hosting
2
University of California: eScholarship
2
University of Washington, Seattle: Digital Collections
2
ACS Publications (via Crossref)
1
ASI Research Portal (Arkansas Studies Institute Catalog)
1
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Arctic Institute of North America (via Crossref)
1
Auburn University Digital Library
1
CDC Stacks (Centers for Disease Control and Prevention)
1
Canadian Science Publishing (via Crossref)
1
Copernicus Publications: E-Journals
1
Curtin University: espace
1
Edith Cowan University (ECU, Australia): Research Online
1
Emerald (via Crossref)
1
German Aerospace Center: elib - DLR electronic library
1
Harvard University: Harvard Collections
1
Hathi Trust Digital Library
1
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