Collection
Springer eBooks 2005-
266
Springer Book Archives -2004
133
Directory of Open Access Books
124
ACS Symposium Series
51
Cambridge Books Online
24
Elsevier eBook collection Mathematics
19
DeGruyter MPG Collection
11
Eighteenth Century Collections Online / ECCO
10
ACS Advances in Chemistry
6
National Center for Biotechnology Information
5
O'Reilly
4
Making of Modern Law / Legal Treatises
3
OAPEN
2
Oxford University Press
1