Content Provider
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
47
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
41
e-rara.ch (ETH Zürich)
27
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
15
The Portal to Texas History (University of North Texas)
11
The Library of Congress: American Memory
6
Doria (National Library of Finland)
4
Digital Library of Wielkopolska
3
DataCite Metadata Store (German National Library of Science and Technology)
2
MCS University Digital Library
2
Kujawsko-Pomorska Digital Library (Nicolaus Copernicus University Torun) / Kujawsko-Pomorska Biblioteka Cyfrowa
1