Environmental Science

Wiley Online Library

Number of E-Books: 
3400+
Number of E-Journals: 
2000+

OARE

Number of E-Books: 
8000+
Number of E-Journals: 
14000+

AGORA

Number of E-Books: 
9400+
Number of E-Journals: 
18000+

World Bank Open Resources

ScienceDirect

Number of E-Journals: 
613

DOAB - Directory of Open Access Books

Number of E-Books: 
36000+

Pages