Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
9,658
Directory of Open Access Journals: DOAJ Articles
424
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
71
David Rumsey Historical Map Collection (Cartography Associates)
31
Zenodo
22
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
20
NOAA NCEI Environmental Data Archive (via DataONE)
15
Unknown
9
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
6
Cambridge University Press
5
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
4
Portal de revistas académicas de la Universidad de Costa Rica
4
Defense Technical Information Center: DTIC Technical Reports database
3
Informa
3
Informa (via Crossref)
3
Jultika - University of Oulu repository
3
Magnolia press
3
Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA)
3
University of Calgary Journal Hosting
3
University of Groningen research database
3
University of Tromsø: Munin Open Research Archive
3
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Digital.CSIC (Spanish National Research Council)
2
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
2
Inta Digital (ID - Instituto Nacional de Tecnología Agropecuaria)
2
LaCRIS - University of Lapland Current Research System
2
Natural Environment Research Council: NERC Open Research Archive
2
PANGAEA - Data Publisher for Earth & Environmental Science
2
Scientia Marina (E-Journal)
2
UNESDOC - UNESCO Digital Library
2
University of Nebraska-Lincoln: DigitalCommons@UNL
2
Vrije Universiteit Amsterdam (VU): Research Portal
2
Wiley Online Library
2
Anales del Jardín Botánico de Madrid (Real Jardín Botánico - CSIC)
1
Arctic Institute of North America (via Crossref)
1
Australian National University: ANU Digital Collections
1
Bulletin of NSAU (Novosibirsk State Agrarian University)
1
Cambridge University Press (via Crossref)
1
Canadian Science Publishing
1
Canadian Science Publishing (via Crossref)
1
CentAUR: Central Archive at the University of Reading
1
Cornell University: eCommons@Cornell
1
CyberLeninka (Scientific Electronic Library)
1
Dialnet - Portada de revistas (Universidad de La Rioja)
1
Edinburgh Napier Repository (Napier University Edinburgh)
1
FIZ Karlsruhe: RADAR
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Florida Online Journals (FloridaOJ)
1
more ...