Collection
World Bank E-Library Archive
590
Making of the Modern World
281
Directory of Open Access Books
91
Springer Book Archives -2004
29
Springer eBooks 2005-
23
National Center for Biotechnology Information
16
OAPEN
7
Eighteenth Century Collections Online / ECCO
6
International Monetary Fund
6
Edward Elgar eBook Archive
2
O'Reilly
2
Elsevier Handbooks in Economics
1