Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
416
Directory of Open Access Journals: DOAJ Articles
63
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
13
David Rumsey Historical Map Collection (Cartography Associates)
7
Portal de revistas académicas de la Universidad de Costa Rica
2
University of Lethbridge Digitized Collections
2
Brock University Digital Repository
1
Cambridge University Press
1
Knowledge Network for Biocomplexity (via DataONE)
1
NOAA NCEI Environmental Data Archive (via DataONE)
1
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
1
PubMed Central (PMC)
1
Scientia Marina (E-Journal)
1
The University of Utah: J. Willard Marriott Digital Library
1
UTSA Digital Collections (The University of Texas at San Antonio)
1
University of British Columbia: cIRcle - UBC's Information Repository
1
University of Rhode Island: DigitalCommons@URI
1
Vernadsky National Library of Ukraine: DSpace
1
Wiley Online Library
1