Content Provider
Directory of Open Access Journals: DOAJ Articles
5
Biodiversity Heritage Library (BHL)
4
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
3
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
2
Unknown
2
Center for Jewish History: Digital Collections
1
GettDigital (Gettysburg College Digital Collections)
1
The Portal to Texas History (University of North Texas)
1
University of Florida: Digital Library Center
1
Zenodo
1