Collection
Directory of Open Access Books
453
National Center for Biotechnology Information
187
Springer eBooks 2005-
75
Henry Stewart Talks
61
Springer Book Archives -2004
33
Karger eBooks Collection 1997-2013
30
Eighteenth Century Collections Online / ECCO
14
ACS Symposium Series
7
O'Reilly
2
World Bank E-Library Archive
2
MIT Press eBook Archive
1
OAPEN
1
Wiley Online Books
1