Institutional Repositories World

Institutional Repositories World
1	Arxiv.org e-Print Archive	http://arxiv.org/
2	Social Science Research Network	https://ssm.com/en/index.cfm
3	Smithsonian/NASA Astrophysics Data System	http://adsabs.harvard.edu/
4	Research Papers in Economics	http://repec.org/
5	CiteSeerX	http://citeseerx.ist.psu.edu/index
6	University of Callifornia eScholarship Repository	https://escholarship.org/