Collection
Eighteenth Century Collections Online / ECCO
127
Directory of Open Access Books
39
Springer eBooks 2005-
35
O'Reilly
29
Springer Book Archives -2004
21
Oxford University Press
15
Cambridge Books Online
11
National Center for Biotechnology Information
10
OAPEN
8
MIT Press eBook Archive
5
Making of the Modern World
5
Emerald Business, Management and Economics eBook Collection Archive
2
DeGruyter MPG Collection
1
Edward Elgar eBooks Collection Business & Economics
1