Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
4,161
ORA - Oxford University Research Archive
2
The University of Milan: Archivio Istituzionale della Ricerca (AIR)
2
University of Portsmouth: Portsmouth Research Portal
2
Copernicus Publications: E-Journals
1
Geological Quarterly
1
Niedersächsisches Online-Archiv NOA
1
University College London: UCL Discovery
1
University of Greenwich: Greenwich Academic Literature Archive
1
Unknown
1