Database
EBSCOhost Ebook Collection
47
Proquest Ebook Central Academic Complete
37
Springer Complete eBooks
28
Academic Search Premier
6
ScienceDirect
5
Oxford Scholarship Online
4
Springer Nature Complete Journals
4
Springer e-books
4
Wiley Online Library Database Model
4
Springer eBooks
3
Books at JSTOR
2
EBSCO Open Access Journals
2
IOPscience Extra excluding ECS
2
APS-ALL (American Physical Society)
1
DOAJ: Directory of Open Access Journals
1
Hindawi Open Access Journals
1
Wiley-Blackwell Backfiles (PALCI)
1