http://ga.water.usgs.gov/edu/hyhowworks.html
http://lilt.ilstu.edu/psanders/liltsearch/hydroelectric.html
http://wikianswers.com/Q/what_are_the_good_and_bad_things_about_hydroelectric_power
www.georgiapower.com/about/plants.asp
http://lilt.ilstu.edu/psanders/liltsearch/hydroelectric.html
http://wikianswers.com/Q/what_are_the_good_and_bad_things_about_hydroelectric_power
www.georgiapower.com/about/plants.asp