Collection
Directory of Open Access Books
356
World Bank E-Library Archive
88
Making of the Modern World
47
ACS Symposium Series
44
Eighteenth Century Collections Online / ECCO
18
Henry Stewart Talks
15
National Center for Biotechnology Information
13
OAPEN
13
ACS Advances in Chemistry
5
Elsevier ScienceDirect eBooks
3
O'Reilly
3
Cambridge Books Online
2
JSTOR Open Access Books
2
Oxford University Press
2
DeGruyter MPG Collection
1
Editoria Italiana Online
1