Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
8,511
DataCite Metadata Store (German National Library of Science and Technology)
5,890
NOAA NCEI Environmental Data Archive (via DataONE)
2,263
Zenodo
378
Unknown
240
Directory of Open Access Journals: DOAJ Articles
229
Defense Technical Information Center: DTIC Technical Reports database
155
ScienceDirect (Elsevier - via Crossref)
153
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
129
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
115
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
97
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
86
Natural Environment Research Council: NERC Open Research Archive
79
Digital.CSIC (Spanish National Research Council)
78
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
76
David Rumsey Historical Map Collection (Cartography Associates)
75
Springer Nature (via Crossref)
75
Université de Nantes: HAL-UNIV-NANTES
73
Wiley Online Library
70
Institut national des sciences de l'Univers: HAL-INSU
68
PubMed Central (PMC)
67
Magnolia press
63
University of São Paulo: Digital Library of Theses and Dissertations
62
Wiley Online Library (via Crossref)
62
Biodiversity Heritage Library (BHL)
58
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
58
ScienceDirect (Elsevier)
52
Cambridge University Press
50
Copernicus Publications: E-Journals
50
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
49
University of Southampton: e-Prints Soton
40
Frontiers: Figshare
38
Research Data Australia (Australian National Data Service - ANDS)
37
Niedersächsisches Online-Archiv NOA
34
HAL Sorbonne Université
33
USP Production Repository (Universidade de São Paulo)
30
NASA Technical Reports Server (NTRS)
28
Informa (via Crossref)
26
RI FURG (Repositório da Universidade Federal do Rio Grande)
26
SciELO Brazil (Scientific Electronic Library Online)
26
University of Cape Town: OpenUCT
26
Phaidra Digital Collections (Permanent Hosting, Archiving and Indexing of Digital Resources and Assets - Università degli Studi di Padova)
25
Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University
25
Oxford University Press
23
MDPI Open Access Publishing
22
National Library of Australia: Digital Collections
21
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
21
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
21
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
20
Universidade de São Paulo: Portal de Revistas da USP
20
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