Collection
Directory of Open Access Books
23
Oxford University Press
8
OAPEN
7
Digi20
6
DeGruyter MPG Collection
4
MIT Press eBook Archive
4
Springer Book Archives -2004
4
Springer eBooks 2005-
4
Cambridge Books Online
3
Eighteenth Century Collections Online / ECCO
1
Elsevier ScienceDirect eBooks
1
JSTOR Open Access Books
1