Collection
Directory of Open Access Books
461
OAPEN
50
Digi20
23
Springer Book Archives -2004
20
Springer eBooks 2005-
13
Oxford University Press
8
Cambridge Books Online
5
MIT Press eBook Archive
4
DeGruyter MPG Collection
3
Oxford Handbook Online
3
Editoria Italiana Online
1
JSTOR Open Access Books
1
O'Reilly
1
Wiley Online Books
1