Environmental Science

AGORA

Number of E-Books: 
1000+
Number of E-Journals: 
7500+

World Bank Open Resources

ScienceDirect

Number of E-Journals: 
613

DOAB - Directory of Open Access Books

Number of E-Books: 
40000+

DOAJ - Directory of Open Access Journals

Number of E-Journals: 
19000+

Springer

Number of E-Books: 
14000+
Number of E-Journals: 
2500+

Pages