Collection
Eighteenth Century Collections Online / ECCO
2,341
Springer Book Archives -2004
1,003
Springer eBooks 2005-
900
Directory of Open Access Books
93
OAPEN
10
Cambridge Books Online
9
Making of the Modern World
5
Editoria Italiana Online
4
Oxford University Press
4
DeGruyter MPG Collection
3
Standards and Norms (DIN Media)
3
Wiley Online Books
2
Digi20
1
Elsevier eBook collection Mathematics
1
JSTOR Open Access Books
1
National Center for Biotechnology Information
1
O'Reilly
1