Collection
National Center for Biotechnology Information
3,222
Eighteenth Century Collections Online / ECCO
583
OECD Books and Papers
297
Springer eBooks 2005-
190
Directory of Open Access Books
185
Springer Book Archives -2004
86
O'Reilly
20
OAPEN
17
Karger eBooks Collection 1997-2013
12
JSTOR Open Access Books
9
ACS Symposium Series
6
Edward Elgar eBooks Collection Business & Economics
5
Emerald Business, Management and Economics eBook Collection Archive
3
Making of the Modern World
3
Edward Elgar eBook Archive
2
Cambridge Books Online
1
Ethnographic Video Online Vol. 1
1
Oxford Handbook Online
1