Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,188
IEDA: Marine-Geo Digital Library (via DataONE)
11
IEDA: US Antarctic Program Data Center (via DataONE)
4
Directory of Open Access Journals: DOAJ Articles
2
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS)
1
Cambridge University Press
1
Dresden University of Technology: Qucosa
1
MDPI Open Access Publishing
1
NASA Technical Reports Server (NTRS)
1
Natural Environment Research Council: NERC Open Research Archive
1
OA@INAF (Istituto Nazionale di Astrofisica)
1
Open Access Victoria University of Wellington / Te Herenga Waka
1
Unknown
1
Utrecht University Repository
1