Collection
Directory of Open Access Books
131
World Bank E-Library Archive
51
OAPEN
6
Making of the Modern World
3
ACS Symposium Series
2
Brill Nijhoff E-Books Collections 2009-2014
2
Digi20
2
Eighteenth Century Collections Online / ECCO
2
JSTOR Open Access Books
2
ACS Advances in Chemistry
1
Bloomsbury Education and Childhood Studies
1
Brill Nijhoff E-Books Collections 2006-2008
1
Cambridge Books Online
1
DeGruyter MPG Collection
1
National Center for Biotechnology Information
1
wiso-net eBooks
1