Collection
World Bank E-Library Archive
248
Making of the Modern World
212
Directory of Open Access Books
124
OECD Books and Papers
87
O'Reilly
29
Edward Elgar eBook Archive
17
Springer eBooks 2005-
14
International Monetary Fund
13
National Center for Biotechnology Information
11
Eighteenth Century Collections Online / ECCO
6
OAPEN
6
Springer Book Archives -2004
2
wiso-net eBooks
2