Where can I find information about the US economy?

I'm doing a project in school, and I have to research on oil economics, specifically taxation in [Northern] Virginia. I can't seem to find any good sources, though. Can anyone tell me where I can find legitimate, reliable information?|||Here are some sites:





http://www.50states.com/virginia.htm


http://www.bls.gov/eag/eag.va.htm


http://www.infoplease.com/atlas/state/vi鈥?/a>


http://www.factmonster.com/ipka/A0108283鈥?/a>


http://www.worldalmanacforkids.com/explo鈥?/a>


http://www.gatewayva.com/biz/virginiabus鈥?/a>|||You can just type each one seperatly in your search bar.