Collection
Eighteenth Century Collections Online / ECCO
298
Springer eBooks 2005-
184
Springer Book Archives -2004
77
Directory of Open Access Books
64
Edward Elgar eBooks Collection Business & Economics
7
National Center for Biotechnology Information
6
OAPEN
4
Karger eBooks Collection 1997-2013
3
Nomos
3
OECD Books and Papers
2
Editoria Italiana Online
1
Edward Elgar eBook Archive
1
MIT Press eBook Archive
1
Making of the Modern World
1
O'Reilly
1
Wiley Online Books
1