Collection
Directory of Open Access Books
2,573
IEEE Conference Proceedings
1,236
Springer eBooks 2005-
928
O'Reilly
715
JSTOR Open Access Books
506
OAPEN
424
OECD Books and Papers
345
National Center for Biotechnology Information
186
Nomos
121
IEEE Standards
107
VDE NormenBibliothek
48
MIT Press eBook Archive
46
Cambridge Books Online
35
Henry Stewart Talks
30
DeGruyter MPG Collection
25
MIT Press Direct to Open
22
Edward Elgar eBooks Collection Business & Economics
12
Duncker & Humblot eBooks 2007-
9
Mohr Siebeck eBooks
8
Standards and Norms (DIN Media)
8
Oxford University Press
6
Wiley Online Books
5
JSTOR Books
4
Bloomsbury Education and Childhood Studies
3
Springer Book Archives -2004
3
beck-elibrary
1