Collection
Making of the Modern World
338
Directory of Open Access Books
223
World Bank E-Library Archive
180
OECD Books and Papers
110
Eighteenth Century Collections Online / ECCO
55
International Monetary Fund
14
OAPEN
13
O'Reilly
8
Edward Elgar eBook Archive
6
National Center for Biotechnology Information
5
Springer eBooks 2005-
3
wiso-net eBooks
3