Collection
Directory of Open Access Books
247
OECD Books and Papers
213
Springer eBooks 2005-
150
Springer Book Archives -2004
41
OAPEN
16
O'Reilly
9
National Center for Biotechnology Information
5
Emerald Business, Management and Economics eBook Collection Archive
3
Cambridge Books Online
2
JSTOR Open Access Books
2
MIT Press eBook Archive
2
DeGruyter MPG Collection
1
World Bank E-Library Archive
1