Collection
Cambridge Books Online
3
DeGruyter MPG Collection
4
Digi20
1
Directory of Open Access Books
55
Editoria Italiana Online
2
Eighteenth Century Collections Online / ECCO
13
Elsevier ScienceDirect eBooks
1
Elsevier eBook collection Mathematics
1
JSTOR Open Access Books
5
Lecture Notes in Computer Science
19
MIT Press eBook Archive
3
O'Reilly
29
OAPEN
13
Springer Book Archives -2004
13
Springer eBooks 2005-
61
Wiley Online Books
1
World Bank E-Library Archive
1