Collection
Eighteenth Century Collections Online / ECCO
2,292
Springer Book Archives -2004
882
Springer eBooks 2005-
817
Directory of Open Access Books
70
OAPEN
8
Cambridge Books Online
6
Oxford University Press
4
DeGruyter MPG Collection
3
Standards and Norms (DIN Media)
3
Making of the Modern World
2
Wiley Online Books
2
Editoria Italiana Online
1
Elsevier eBook collection Mathematics
1
JSTOR Open Access Books
1
National Center for Biotechnology Information
1
O'Reilly
1