Content Provider
Biodiversity Heritage Library (BHL)
346
WikiBooks - Open-content textbooks
81
University of Southampton: e-Prints Soton
62
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
49
Unknown
34
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
29
Technical University of Denmark: DTU Orbit
29
University of Copenhagen: Research
28
Cambridge University Press
24
Texas A&M University Digital Repository
24
Oxford University Press (via Crossref)
22
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
19
DataCite Metadata Store (German National Library of Science and Technology)
18
Aarhus University: Research
17
University of the Highlands and Islands: Research Database of UHI
16
Springer Nature (via Crossref)
15
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
13
De Gruyter
12
JSTOR
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
Oxford University Press
12
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
11
David Rumsey Historical Map Collection (Cartography Associates)
9
RePEc (Research Papers in Economics)
9
The State Library of Massachusetts: Electronic Repository
8
Brill
7
Informa
7
Instituto Español de Oceanografía: e-IEO
7
Language Science Press
7
Texas A&M University Galveston Campus: DSpace Repository
7
norden (Nordic Council of Ministers): Publications (DiVA)
7
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
6
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
6
Biblioteca Virtual de Defensa (BVD - Ministerio de Defensa de España)
6
Digital.CSIC (Spanish National Research Council)
6
Open Research Library
6
OpenAgrar (OA)
6
University of Toronto Press (U Toronto Press - via Crossref)
6
GEO-LEOe-docs (FID GEO)
5
JSTOR (via Crossref)
5
Springer Nature
5
Université de Nantes: HAL-UNIV-NANTES
5
Amsterdam University Press (AUP)
4
Informa (via Crossref)
4
Marine Institute Open Access Repository
4
University of Bristol: Bristol Research
4
University of East Anglia: UEA Digital Repository
4
University of Groningen research database
4
University of Otago: OUR Heritage (Otage University Research)
4
Vrije Universiteit Amsterdam (VU): Research Portal
4
more ...