Collection
Directory of Open Access Books
58
OECD Books and Papers
43
Springer eBooks 2005-
31
Springer Book Archives -2004
6
OAPEN
3
Bloomsbury Education and Childhood Studies
2
Eighteenth Century Collections Online / ECCO
2
National Center for Biotechnology Information
2
O'Reilly
2
JSTOR Open Access Books
1
Making of the Modern World
1