Collection
Directory of Open Access Books
223
World Bank E-Library Archive
28
OAPEN
17
wiso-net eBooks
16
O'Reilly
8
Eighteenth Century Collections Online / ECCO
4
Digi20
3
International Monetary Fund
3
Springer eBooks 2005-
3
ACS Symposium Series
2
Bloomsbury Education and Childhood Studies
1
JSTOR Open Access Books
1
Making of the Modern World
1