Content Provider
Cambridge University Press
15
Unknown
13
Ohio State University (OSU): Knowledge Bank
11
DataCite Metadata Store (German National Library of Science and Technology)
7
Defense Technical Information Center: DTIC Technical Reports database
7
Directory of Open Access Journals: DOAJ Articles
7
The University of Maine: DigitalCommons@UMaine
5
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
4
Illinois State Library: Illinois Digital Archives
4
Wiley Online Library
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Copernicus Publications: E-Journals
3
Institut national des sciences de l'Univers: HAL-INSU
3
Natural Environment Research Council: NERC Open Research Archive
3
The University of Kansas: KU ScholarWorks
3
Université Grenoble Alpes: HAL
3
Université de Nantes: HAL-UNIV-NANTES
3
Columbia University: Academic Commons
2
Indiana University - Purdue University Indianapolis: IUPUI Scholar Works
2
NASA Technical Reports Server (NTRS)
2
Niedersächsisches Online-Archiv NOA
2
University of Nebraska-Lincoln: DigitalCommons@UNL
2
eCite UTAS (University of Tasmania)
2
AAAS Resource Center (American Association for the Advancement of Science)
1
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia)
1
Archives ouvertes de Paris-Saclay
1
Central Washington University: ScholarWorks
1
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
1
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
1
DataCite
1
Digital Collections of Colorado (Colorado State University)
1
Digital Repository of the University of Hawaii at Manoa
1
Digital.CSIC (Spanish National Research Council)
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
Ghent University Academic Bibliography
1
HAL Sorbonne Université
1
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
1
IEDA: US Antarctic Program Data Center (via DataONE)
1
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
1
MDPI Open Access Publishing
1
Montclair State University Digital Commons
1
Mountain Scholar (Digital Collections of Colorado and Wyoming)
1
Muséum National d'Histoire Naturelle (MNHM): HAL
1
National Archive of PhD Theses (National Documentation Centre Greece)
1
Open Access Victoria University of Wellington / Te Herenga Waka
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
Oxford University Press
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
PubMed Central (PMC)
1
Publication Server of Tier University (OPUS)
1
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