Collection
Directory of Open Access Books
16
Making of the Modern World
11
MIT Press eBook Archive
10
ACS Symposium Series
7
O'Reilly
6
OAPEN
6
Oxford University Press
4
Eighteenth Century Collections Online / ECCO
2
ACS Advances in Chemistry
1
DeGruyter MPG Collection
1
Digi20
1
Making of Modern Law / Legal Treatises
1
National Center for Biotechnology Information
1
Social Theory (Alexander Street Press)
1