Content Provider
University of Malta: OAR@UM
124
DataCite Metadata Store (German National Library of Science and Technology)
10
USGS Science Data Catalog (via DataONE)
5
NOAA NCEI Environmental Data Archive (via DataONE)
4
Unknown
4
WHO (World Health Organization): Institutional Repository for Information Sharing (IRIS)
4
Directory of Open Access Journals: DOAJ Articles
3
PANGAEA - Data Publisher for Earth & Environmental Science
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Ghent University Academic Bibliography
2
MALVL (MAL Virtual Library - General Jonas Zemaitis Military Academy of Lithuania)
2
Opin vísindi (Iceland)
2
Université Grenoble Alpes: HAL
2
Université de Nantes: HAL-UNIV-NANTES
2
ARPI - Archivio della Ricerca dell'Università di Pisa
1
Ankara University Open Archive System
1
Archaeology, Ethnology & Anthropology of Eurasia (E-Journal)
1
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
1
Defense Technical Information Center: DTIC Technical Reports database
1
DergiPark Akademik (E-Journals)
1
Digital Commons @ Montana Tech
1
Digital Library of University of Maribor
1
DigitalCommons@University of Georgia School of Law
1
Doria (National Library of Finland)
1
Durham University: Durham e-Theses
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
JMU Scholarly Commons (James Madison University)
1
Karadeniz Teknik Üniversitesi Açık Erişim Sistemi (KTÜAES)
1
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
1
Natural Environment Research Council: NERC Open Research Archive
1
New Mexico Digital Collections (The University of New Mexico - UNM)
1
Padua Research Archive (IRIS - Università degli Studi di Padova)
1
Scientia Marina (E-Journal)
1
Skemman (Iceland)
1
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive)
1
Universidad EAFIT, Medellin: Repositorio Institucional
1
University of Luxembourg: ORBilu - Open Repository and Bibliography
1
University of Pittsburgh: Archive of European Integration (AEI)
1
Università degli Studi di Siena: USiena air
1
Zenodo
1