Collection
Directory of Open Access Books
201
O'Reilly
43
International Monetary Fund
15
Springer eBooks 2005-
13
Cambridge Books Online
7
Oxford University Press
5
World Bank E-Library Archive
4
Elsevier eBook collection Mathematics
3
Emerald Business, Management and Economics eBook Collection Archive
2
MIT Press eBook Archive
2
DeGruyter MPG Collection
1
Elsevier ScienceDirect eBooks
1
JSTOR Books
1
OAPEN
1
Wiley Online Books
1