1. Electric Power Industry Needs for Grid-Scale Storage Applicationshttp://energy.tms.org/docs/pdfs/Electric_Power_Industry_Needs_2010.pdf
2. 2012 Wind Technologies Market Reporthttp://www1.eere.energy.gov/wind/pdfs/2012_wind_technologies_market_report.pdf
3. Installed Wind Capacityhttp://www.windpoweringamerica.gov/wind_installed_capacity.asp
4. Dynamic Maps, GIS Data, & Analysis Tools, U.S. 50 m Wind Resource Maphttp://www.nrel.gov/gis/wind.html