Collection
O'Reilly
180
Springer eBooks 2005-
75
Directory of Open Access Books
10
MIT Press eBook Archive
9
JSTOR Open Access Books
5
OAPEN
4
DeGruyter MPG Collection
1
Emerald Business, Management and Economics eBook Collection Archive
1
National Center for Biotechnology Information
1
Springer Book Archives -2004
1
wiso-net eBooks
1