Collection
O'Reilly
99
Directory of Open Access Books
40
Eighteenth Century Collections Online / ECCO
25
MIT Press eBook Archive
6
OAPEN
5
Springer Book Archives -2004
3
Making of the Modern World
2
Cambridge Books Online
1
Editoria Italiana Online
1
Elsevier ScienceDirect eBooks
1
Emerald Business, Management and Economics eBook Collection Archive
1
JSTOR Open Access Books
1