Content Provider
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
64
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
26
The Portal to Texas History (University of North Texas)
7
e-rara.ch (ETH Zürich)
4
DataCite Metadata Store (German National Library of Science and Technology)
3
Digital Library of Wielkopolska
1
Doria (National Library of Finland)
1
George Mason University: MARS
1
Harvard University: Harvard Collections
1