Collection
Directory of Open Access Books
1,461
OAPEN
326
DeGruyter MPG Collection
319
Springer Book Archives -2004
225
Springer eBooks 2005-
216
Digi20
148
Eighteenth Century Collections Online / ECCO
31
Cambridge Books Online
14
MIT Press eBook Archive
13
JSTOR Open Access Books
11
Oxford Handbook Online
9
Oxford University Press
8
Nomos
4
O'Reilly
4
Editoria Italiana Online
3
National Center for Biotechnology Information
2
Anthropology Online
1
Elsevier eBook collection Mathematics
1
Ethnographic Video Online Vol. 1
1
Mohr Siebeck eBooks
1
Wiley Online Books
1