Collection
Directory of Open Access Books
4,908
OECD Books and Papers
1,410
O'Reilly
318
National Center for Biotechnology Information
313
OAPEN
216
Making of the Modern World
58
Eighteenth Century Collections Online / ECCO
51
Springer eBooks 2005-
40
Edward Elgar eBooks Collection Business & Economics
26
Wiley Online Books
16
Standards and Norms (DIN Media)
10
Edward Elgar eBook Archive
9
Springer Book Archives -2004
8
Ethnographic Video Online Vol. 1
5
Nomos
2
JSTOR Open Access Books
1
Oxford Handbook Online
1