Collection
Digi20
20
Directory of Open Access Books
3,661
Eighteenth Century Collections Online / ECCO
34
Ethnographic Video Online Vol. 1
3
JSTOR Open Access Books
1
Making of the Modern World
14
Mohr Siebeck eBooks
39
National Center for Biotechnology Information
154
Nomos
30
O'Reilly
10,225
OAPEN
168
Springer Book Archives -2004
9
Springer eBooks 2005-
22
Standards and Norms (DIN Media)
81