Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
552
USGS Science Data Catalog (via DataONE)
106
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
97
Arctic Data Center (via DataONE)
46
North Dakota State University (NDSU): Digital Horizons
20
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
15
Unknown
12
Directory of Open Access Journals: DOAJ Articles
11
DataCite
8
Defense Technical Information Center: DTIC Technical Reports database
8
Luleå University of Technology Publications (DiVA)
6
PANGAEA - Data Publisher for Earth & Environmental Science
6
Zenodo
6
Colecciones digitales - Biblioteca Virtual del Banco de la República
5
Frankfurt/Main University Library: Digitale Sammlungen
5
OpenEdition
5
The University of Adelaide: Digital Library
5
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
5
Digital.CSIC (Spanish National Research Council)
4
IEDA: Marine-Geo Digital Library (via DataONE)
4
IEDA: US Antarctic Program Data Center (via DataONE)
4
The University of Delaware Library Institutional Repository
4
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive)
4
The University of Utah: J. Willard Marriott Digital Library
4
Caltech Authors (California Institute of Technology)
3
Doria (National Library of Finland)
3
Norsk Polarinstitutt: Brage NP
3
Norwegian Polar Institute: Brage NP
3
The digital State Library of Upper Austria (oö)
3
University of California: eScholarship
3
University of Lethbridge Digitized Collections
3
University of Nebraska-Lincoln: DigitalCommons@UNL
3
University of Tromsø: Munin Open Research Archive
3
University of Tromsø: Septentrio Academic Publishing
3
Wiley Online Library
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Cambridge University Press
2
CyberLeninka (Scientific Electronic Library)
2
DIGIBUG: Repositorio Institucional de la Universidad de Granada
2
Dove Medical Press
2
Environmental Data Initiative (via DataONE)
2
Hathi Trust Digital Library
2
Instituto Español de Oceanografía: e-IEO
2
NOAA NCEI Environmental Data Archive (via DataONE)
2
NTNU Open Archive (Norwegian University of Science and Technology)
2
Publication Server of Goethe University Frankfurt am Main
2
Purdue University: e-Pubs
2
Research Data Australia (Australian National Data Service - ANDS)
2
SciELO Brazil (Scientific Electronic Library Online)
2
The University of Texas at Austin: Texas ScholarWorks
2
more ...