Collection
Directory of Open Access Books
38
Eighteenth Century Collections Online / ECCO
32
Digi20
8
OAPEN
8
Oxford University Press
7
DeGruyter MPG Collection
3
Editoria Italiana Online
3
MIT Press eBook Archive
3
Netlibrary
3
Oxford Handbook Online
3
National Center for Biotechnology Information
2
ACS Symposium Series
1
Cambridge Books Online
1
Emerald Business, Management and Economics eBook Collection Archive
1
JSTOR Open Access Books
1
Making of the Modern World
1
Mohr Siebeck eBooks
1
O'Reilly
1