Collection
Springer eBooks 2005-
25
Springer Book Archives -2004
21
Cambridge Books Online
5
Directory of Open Access Books
5
Eighteenth Century Collections Online / ECCO
4
Edward Elgar eBooks Collection Business & Economics
3
OAPEN
2
Springer Lecture Notes Archiv 1964-1996
2
Brill Nijhoff E-Books Collections 2009-2014
1
Edward Elgar eBook Archive
1
Karger eBooks Collection 1997-2013
1
O'Reilly
1