Collection
Springer eBooks 2005-
103
Springer Book Archives -2004
84
Directory of Open Access Books
9
DeGruyter MPG Collection
8
O'Reilly
4
Elsevier eBook collection Mathematics
2
JSTOR Open Access Books
2
OAPEN
2
Cambridge Books Online
1
Elsevier ScienceDirect eBooks
1
Oxford University Press
1
Wiley Online Books
1