Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
223
North Dakota State University (NDSU): Digital Horizons
15
NOAA NCEI Environmental Data Archive (via DataONE)
4
DataCite
2
Doria (National Library of Finland)
1
Gottfried Wilhelm Leibniz Bibliothek, Hannover: Digitale Sammlungen - Drucke
1
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
1
Springer Nature (via Crossref)
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1