Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
1,693
DataCite Metadata Store (German National Library of Science and Technology)
50
DataCite
34
IEDA: Marine-Geo Digital Library (via DataONE)
24
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
10
Defense Technical Information Center: DTIC Technical Reports database
9
NOAA NCEI Environmental Data Archive (via DataONE)
6
Biodiversity Heritage Library (BHL)
2
Borealis
2
SEANOE (Sea scientific open data publication)
2
University of Calgary Journal Hosting
2
Unknown
2
Aalto University Publication Archive (Aaltodoc)
1
Arctic Data Center (via DataONE)
1
Clemson University: TigerPrints
1
ETH Zürich Research Collection
1
University of North Texas: UNT Digital Library
1