Content Provider
Biodiversity Heritage Library (BHL)
1,270
WikiBooks - Open-content textbooks
445
Unknown
231
Cambridge University Press
220
Arctic Portal Library
213
Aarhus University: Research
159
LaCRIS - University of Lapland Current Research System
112
University of Copenhagen: Research
102
Springer Nature
81
Informa (via Crossref)
69
VTT's Research Information Portal
66
Oxford University Press (via Crossref)
64
Technical University of Denmark: DTU Orbit
62
JSTOR
50
RePEc (Research Papers in Economics)
48
UNESDOC - UNESCO Digital Library
48
norden (Nordic Council of Ministers): Publications (DiVA)
47
Springer Nature (via Crossref)
45
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
43
DataCite Metadata Store (German National Library of Science and Technology)
42
Open Research Library
41
University of Lapland: Lauda
39
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
38
De Gruyter
36
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
33
Aalborg University's Research Portal
31
Oxford University Press
30
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
24
Informa
24
UQAM - Université du Québec à Montréal: archipel
24
The National Academies Press (via Crossref)
23
Roskilde University Research Portal (RUC)
22
Brill
21
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
20
Zenodo
19
Arctic Council Repository
17
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
17
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
15
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
15
David Rumsey Historical Map Collection (Cartography Associates)
14
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
14
PRISM - University of Calgary Digital Repository
13
Texas A&M University Digital Repository
13
University of Southampton: e-Prints Soton
13
University of Southern Denmark Research Portal
13
American Museum of Natural History: AMNH scientific publications
12
Australian National University: ANU Digital Collections
12
Johns Hopkins University Press
12
UArctic Library
12
University of Groningen research database
12
more ...