Content Provider
Defense Technical Information Center: DTIC Technical Reports database
46
Directory of Open Access Journals: DOAJ Articles
13
Unknown
13
DataCite Metadata Store (German National Library of Science and Technology)
7
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
7
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
6
Washington State University: WSU Libraries Digital Collections
6
National Institute of Polar Research Repository, Japan
5
University of North Texas: UNT Digital Library
5
Copernicus Publications: E-Journals
4
Memorial University of Newfoundland: Research Repository
4
VTT's Research Information Portal
4
Vytautas Magnus University e-Publication Repository (VMU ePub)
4
LAEI VL (Lithuanian Institute of Agrarian Economics Virtual Library)
3
LSRC VL (Lithuanian Social Research Centre Virtual Library)
3
NTNU Open Archive (Norwegian University of Science and Technology)
3
Skemman (Iceland)
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
CyberLeninka (Scientific Electronic Library)
2
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
2
MDPI Open Access Publishing
2
Niedersächsisches Online-Archiv NOA
2
Ohio State University (OSU): Knowledge Bank
2
SINTEF Open (Brage)
2
Tampere University: Trepo
2
UTSA Digital Collections (The University of Texas at San Antonio)
2
University of Alaska: ScholarWorks@UA
2
Wiley Online Library
2
AIP Publishing
1
Aalto University Publication Archive (Aaltodoc)
1
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Arctic and Antarctic Research (E-Journal)
1
Avtomobil'. Doroga. Infrastruktura (E-Journal)
1
BAM-Publica - Publikationsserver der Bundesanstalt für Materialforschung und -prüfung (BAM)
1
BioMed Central
1
C-RECS (Creative - Repository of Electro Communications)
1
Cambridge University Press
1
Cologne University: KUPS
1
Covenant University Repository
1
Croatian Digital Theses Repository (National and University Library in Zagreb)
1
Digitální knihovna Univerzity Pardubice
1
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
1
ESCAP Repository (United Nations Economic and Social Commission for Asia and the Pacific)
1
Emerald (via Crossref)
1
Environmental Protection Agency (EPA): Science Inventory
1
Ghent University Academic Bibliography
1
HELDA – University of Helsinki Open Repository
1
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
1
IOP Publishing (via Crossref)
1
Institut national de la recherche scientifique, Québec: Espace INRS
1
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