Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,719
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Cambridge University Press
1
Digital Commons University of South Florida (USF)
1
Digital.CSIC (Spanish National Research Council)
1
Directory of Open Access Journals: DOAJ Articles
1
Natural Environment Research Council: NERC Open Research Archive
1
University of South Florida St. Petersburg: Digital USFSP
1
Unknown
1