Content Provider
NOAA NCEI Environmental Data Archive (via DataONE)
446
DataCite Metadata Store (German National Library of Science and Technology)
362
Defense Technical Information Center: DTIC Technical Reports database
6
USGS Science Data Catalog (via DataONE)
5
University of Calgary Journal Hosting
4
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
3
Arctic Data Center (via DataONE)
3
NASA Technical Reports Server (NTRS)
3
Xiamen University Institutional Repository
3
Zenodo
3
Copernicus Publications: E-Journals
2
Directory of Open Access Journals: DOAJ Articles
2
Natural Environment Research Council: NERC Open Research Archive
2
Niedersächsisches Online-Archiv NOA
2
PANGAEA - Data Publisher for Earth & Environmental Science
2
Aarhus University: Research
1
Arctic Portal Library
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
1
OpenAgrar (OA)
1
PubMed Central (PMC)
1
The University of Texas at Austin: Texas ScholarWorks
1
University of Southampton: e-Prints Soton
1
University of Tromsø: Munin Open Research Archive
1
University of Washington, Seattle: Digital Collections
1
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
1
Unknown
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1