1. U.S. Energy Information Administration. Energy in Brief;2014.http://www.eia.gov/energy_in_brief/article/major_energy_sources_and_users.cfm(accessed Apr. 12, 2015).
2. Crane, H.
Kinderman, E.
Malhotra, R. Cubic Mile of Oil,1sted.Oxford University Press:Oxford, U.K.,2010; pp1−328.
3. U.S. Department of Energy.Hydro power Project; DOE/GO-102011-3287;2011.
4. U.S. Department of Energy.Water Power for a Clean Energy Future; DOE/EE-0605;2014.