Content Provider
University of Washington, Seattle: Digital Collections
415
Open Parks Network
382
DataCite Metadata Store (German National Library of Science and Technology)
262
Arctic Data Center (via DataONE)
242
University of Michigan: Digital Collections
204
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
169
International Arctic Research Center (IARC) Data Archive (via DataONE)
115
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
95
Unknown
49
Directory of Open Access Journals: DOAJ Articles
39
University of Alaska: ScholarWorks@UA
36
University of North Texas: UNT Digital Library
31
Hathi Trust Digital Library
27
Zenodo
24
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
22
University of Calgary Journal Hosting
21
Washington State University: WSU Libraries Digital Collections
19
USGS Science Data Catalog (via DataONE)
18
University of Tromsø: Septentrio Academic Publishing
13
Wiley Online Library (via Crossref)
11
Copernicus Publications: E-Journals
10
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
10
Canadian Science Publishing (via Crossref)
8
Royal Holloway University of London: Royal Holloway Digital Repository
8
Cambridge University Press
7
David Rumsey Historical Map Collection (Cartography Associates)
7
MDPI Open Access Publishing
7
NASA Technical Reports Server (NTRS)
7
Niedersächsisches Online-Archiv NOA
7
PANGAEA - Data Publisher for Earth & Environmental Science
7
ScienceDirect (Elsevier - via Crossref)
7
PubMed Central (PMC)
6
Texas Tech University: TTU DSpace Repository
6
Wiley Online Library
6
Arctic Institute of North America (via Crossref)
5
Alces (A Journal Devoted to the Biology and Management of Moose)
4
Boise State University: Scholar Works
4
HighWire Press (Stanford University)
4
Oregon Digital (University of Oregon/Oregon State University)
4
PQDT Open: Open Access Dissertations and Theses (ProQuest)
4
RePEc (Research Papers in Economics)
4
ScholarsArchive@OSU (Oregon State University)
4
University of California: eScholarship
4
Arctic Institute of North America
3
BioOne Online Journals
3
Cambridge University Press (via Crossref)
3
ScienceDirect (Elsevier)
3
Springer Nature (via Crossref)
3
The Research Repository @ WVU (West Virginia University)
3
University of Massachusetts: ScholarWorks@UMass Amherst
3
more ...