Collection
Springer Book Archives -2004
182
Springer eBooks 2005-
171
Oxford University Press
83
Directory of Open Access Books
66
Eighteenth Century Collections Online / ECCO
26
OAPEN
23
JSTOR Open Access Books
13
Digi20
10
Cambridge Books Online
9
Editoria Italiana Online
7
Netlibrary
7
MIT Press eBook Archive
6
National Center for Biotechnology Information
5
Making of the Modern World
4
O'Reilly
3
DeGruyter MPG Collection
2
Oxford Handbook Online
1