Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,085
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
10
Unknown
4
Copernicus Publications: E-Journals
3
NOAA NCEI Environmental Data Archive (via DataONE)
3
Niedersächsisches Online-Archiv NOA
3
Cardiff University: ORCA (Online Research @ Cardiff)
2
Directory of Open Access Journals: DOAJ Articles
2
Technical University of Denmark: DTU Orbit
2
University of Calgary Journal Hosting
2
University of California: eScholarship
2
University of Massachusetts: ScholarWorks@UMass Amherst
2
University of North Texas: UNT Digital Library
2
University of Southampton: e-Prints Soton
2
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS)
1
Cambridge University Press
1
HELDA – University of Helsinki Open Repository
1
Imperial College London: Spiral
1
NASA Technical Reports Server (NTRS)
1
NIOZ Repository (Royal Netherlands Institute for Sea Research)
1
North Dakota State University (NDSU): Digital Horizons
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Ohio State University (OSU): Knowledge Bank
1
Open Research Library
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
Padua Research Archive (IRIS - Università degli Studi di Padova)
1
Royal Holloway University of London: Royal Holloway Digital Repository
1
University College London: UCL Discovery
1
University of Michigan: Deep Blue
1
University of Rhode Island: DigitalCommons@URI
1
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
1
Università degli Studi di Urbino: CINECA IRIS
1
Vernadsky National Library of Ukraine: DSpace
1