Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,227
University of Michigan: Digital Collections
29
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Informa
1
Informa (via Crossref)
1