Collection
Directory of Open Access Books
179
O'Reilly
12
OAPEN
11
National Center for Biotechnology Information
9
Eighteenth Century Collections Online / ECCO
6
wiso-net eBooks
2
Anthropology Online
1
Cambridge Books Online
1
Digi20
1
Henry Stewart Talks
1
JSTOR Books
1
Oxford Handbook Online
1
Oxford University Press
1
World Bank E-Library Archive
1