Collection
Directory of Open Access Books
2,417
OAPEN
356
National Center for Biotechnology Information
271
Eighteenth Century Collections Online / ECCO
83
Making of the Modern World
70
Digi20
55
Springer eBooks 2005-
37
Nomos
22
Springer Book Archives -2004
18
Ethnographic Video Online Vol. 1
17
Mohr Siebeck eBooks
8
DeGruyter MPG Collection
1