Collection
Directory of Open Access Books
335
Springer eBooks 2005-
74
O'Reilly
63
OAPEN
21
Springer Book Archives -2004
13
National Center for Biotechnology Information
11
ACS Symposium Series
8
Cambridge Books Online
2
Eighteenth Century Collections Online / ECCO
2
ACS Advances in Chemistry
1
JSTOR Open Access Books
1
MIT Press eBook Archive
1
Oxford University Press
1