Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
562
DataCite Metadata Store (German National Library of Science and Technology)
423
NOAA NCEI Environmental Data Archive (via DataONE)
123
Technical University of Denmark: DTU Orbit
47
Digital.CSIC (Spanish National Research Council)
41
Instituto Español de Oceanografía: e-IEO
31
Frontiers (Publisher)
27
Unknown
26
LeibnizOpen (The Leibniz Association)
21
Ghent University Academic Bibliography
19
University of the Highlands and Islands: Research Database of UHI
16
National University of Ireland (NUI), Galway: ARAN
12
Directory of Open Access Journals: DOAJ Articles
11
Queen's University Belfast Research Portal
11
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
10
ScienceDirect (Elsevier - via Crossref)
10
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
9
University of St Andrews: Digital Research Repository
8
Aberdeen University Research Archive (AURA)
7
Defense Technical Information Center: DTIC Technical Reports database
7
Institut national des sciences de l'Univers: HAL-INSU
7
Magnolia press
7
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
7
Universidad de Las Palmas de Gran Canaria: Acceda
7
University of Groningen research database
6
Université de Bretagne Occidentale: HAL
6
Harvard University: Harvard Collections
5
University of St Andrews: Research Portal
5
Université de Nantes: HAL-UNIV-NANTES
5
Zenodo
5
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
4
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
4
SRUC (Scotland's Rural College): Research Portal
4
ScienceDirect (Elsevier)
4
USGS Science Data Catalog (via DataONE)
4
Vrije Universiteit Amsterdam (VU): Research Portal
4
Aarhus University: Research
3
Dryad Digital Repository (Duke University)
3
HAL Sorbonne Université
3
KovsieScholar Repository (University of the Free State - UFS UV)
3
MDPI Open Access Publishing
3
Muséum National d'Histoire Naturelle (MNHM): HAL
3
Niedersächsisches Online-Archiv NOA
3
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University)
3
Universidade do Algarve: Sapienta
3
University of Liège: ORBi (Open Repository and Bibliography)
3
University of North Texas: UNT Digital Library
3
Université de Paris: Portail HAL
3
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
3
Wageningen UR (University & Research Centre): Digital Library
3
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