Collection
Springer eBooks 2005-
87
Directory of Open Access Books
31
MIT Press eBook Archive
25
Springer Book Archives -2004
23
O'Reilly
9
Elsevier ScienceDirect eBooks
5
Oxford University Press
4
ACS Symposium Series
3
Cambridge Books Online
2
Wiley Online Books
2
DeGruyter MPG Collection
1
JSTOR Open Access Books
1
National Center for Biotechnology Information
1