Collection
Directory of Open Access Books
57
Eighteenth Century Collections Online / ECCO
18
Making of the Modern World
8
National Center for Biotechnology Information
4
Oxford University Press
4
O'Reilly
2
OAPEN
2
Cambridge Books Online
1
Henry Stewart Talks
1
JSTOR Open Access Books
1
Karger eBooks Collection 1997-2013
1
MIT Press eBook Archive
1