Collection
Springer eBooks 2005-
553
Springer Book Archives -2004
142
Directory of Open Access Books
8
Eighteenth Century Collections Online / ECCO
6
ACS Symposium Series
5
JSTOR Open Access Books
5
O'Reilly
5
Making of the Modern World
3
Cambridge Books Online
2
DeGruyter MPG Collection
2
Oxford University Press
2
Editoria Italiana Online
1
Elsevier eBook collection Mathematics
1
MIT Press eBook Archive
1
OAPEN
1
World Bank E-Library Archive
1