Collection
Directory of Open Access Books
212
Springer eBooks 2005-
34
OAPEN
33
Eighteenth Century Collections Online / ECCO
7
Springer Book Archives -2004
6
Bloomsbury Education and Childhood Studies
5
Making of the Modern World
4
Digi20
1
JSTOR Open Access Books
1
National Center for Biotechnology Information
1
Nomos
1