Collection
Springer eBooks 2005-
266
Directory of Open Access Books
139
Springer Book Archives -2004
33
ACS Symposium Series
5
OAPEN
5
O'Reilly
3
Lecture Notes in Physics
2
Oxford University Press
2
World Bank E-Library Archive
2
Cambridge Books Online
1
Elsevier eBook collection Mathematics
1
wiso-net eBooks
1