Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,036
The University of Utah: J. Willard Marriott Digital Library
11
University of Lethbridge Digitized Collections
6
North Dakota State University (NDSU): Digital Horizons
4
Hathi Trust Digital Library
2
Digital.CSIC (Spanish National Research Council)
1
Knowledge Network for Biocomplexity (via DataONE)
1
PMLA - Modern Language Association Publications (via Crossref)
1
SAIC Digital Collections (School of the Art Institute of Chicago)
1
University of Michigan: Digital Collections
1
Zenodo
1