Collection
Directory of Open Access Books
1,146
IEEE Conference Proceedings
325
OECD Books and Papers
146
SPIE Conference Proceedings
83
IEEE Standards
63
O'Reilly
62
OAPEN
43
National Center for Biotechnology Information
33
Edward Elgar eBooks Collection Business & Economics
8
Springer eBooks 2005-
6
Edward Elgar eBook Archive
4
Making of the Modern World
3
Eighteenth Century Collections Online / ECCO
2
Ethnographic Video Online Vol. 1
1
Standards and Norms (DIN Media)
1