Collection
Springer eBooks 2005-
280
Springer Book Archives -2004
181
Directory of Open Access Books
63
National Center for Biotechnology Information
46
O'Reilly
9
Oxford University Press
9
OAPEN
5
Oxford Handbook Online
5
Cambridge Books Online
3
Karger eBooks Collection 1997-2013
3
MIT Press eBook Archive
2
DeGruyter MPG Collection
1
Henry Stewart Talks
1
JSTOR Open Access Books
1