Collection
Digi20
20
Directory of Open Access Books
3,860
Eighteenth Century Collections Online / ECCO
34
Ethnographic Video Online Vol. 1
3
JSTOR Open Access Books
2
Making of the Modern World
14
Mohr Siebeck eBooks
42
National Center for Biotechnology Information
154
Nomos
30
O'Reilly
10,156
OAPEN
160
Springer Book Archives -2004
9
Springer eBooks 2005-
22
Standards and Norms (DIN Media)
81