Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
845
David Rumsey Historical Map Collection (Cartography Associates)
4
Research Data Australia (Australian National Data Service - ANDS)
3
Università degli Studi di Genova: CINECA IRIS
3
Zenodo
3
Digital.CSIC (Spanish National Research Council)
2
Digitale Sammlungen der Herzogin Anna Amalia Bibliothek Weimar (HAAB)
1
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria)
1
Lawrence University: LUX
1
NASA Technical Reports Server (NTRS)
1
Università degli Studi di Messina: IRIS
1