Collection
Springer eBooks 2005-
1,213
Springer Book Archives -2004
322
Directory of Open Access Books
146
Cambridge Books Online
41
O'Reilly
28
ACS Symposium Series
14
DeGruyter MPG Collection
8
Elsevier eBook collection Mathematics
7
Elsevier ScienceDirect eBooks
3
Oxford University Press
3
ACS Advances in Chemistry
2
Lecture Notes in Physics
2
OAPEN
2
Eighteenth Century Collections Online / ECCO
1
Lecture Notes in Mathematics
1
MIT Press eBook Archive
1
Wiley Online Books
1