Collection
Directory of Open Access Books
822
Springer eBooks 2005-
300
Springer Book Archives -2004
101
OAPEN
83
National Center for Biotechnology Information
11
ACS Symposium Series
9
Oxford University Press
4
ACS Advances in Chemistry
2
Cambridge Books Online
2
DeGruyter MPG Collection
2
Elsevier ScienceDirect eBooks
2
JSTOR Open Access Books
2
O'Reilly
2
Wiley Online Books
1