Collection
Digi20
276
Directory of Open Access Books
117
wiso-net eBooks
32
Duncker & Humblot eBooks 2007-
28
OAPEN
18
Mohr Siebeck eBooks
17
DeGruyter MPG Collection
12
JSTOR Open Access Books
7
Making of the Modern World
5
O'Reilly
4
Cambridge Books Online
3
Nomos
2
Oxford University Press
2
Editoria Italiana Online
1
Edward Elgar eBooks Collection Business & Economics
1
Netlibrary
1