Collection
Springer eBooks 2005-
462
Springer Book Archives -2004
329
SPIE Conference Proceedings
111
Eighteenth Century Collections Online / ECCO
88
Directory of Open Access Books
28
O'Reilly
20
Cambridge Books Online
9
JSTOR Open Access Books
5
DeGruyter MPG Collection
4
Making of Modern Law / Legal Treatises
2
National Center for Biotechnology Information
2
OECD Books and Papers
2
Elsevier ScienceDirect eBooks
1
MIT Press eBook Archive
1
OAPEN
1
Wiley Online Books
1