Collection
Springer Book Archives -2004
689
Springer eBooks 2005-
593
Directory of Open Access Books
104
O'Reilly
92
ACS Symposium Series
65
Cambridge Books Online
26
Elsevier eBook collection Mathematics
15
Elsevier ScienceDirect eBooks
14
ACS Advances in Chemistry
12
DeGruyter MPG Collection
10
SPIE Conference Proceedings
5
MIT Press eBook Archive
3
Springer Protocols Archive 1981-2004
3
Henry Stewart Talks
2
OAPEN
2
Wiley Online Books
2
Netlibrary
1
Oxford University Press
1