Sherwood, Larry (August 2012). "U.S. Solar Market Trends 2011"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on September 6, 2012. Retrieved August 17, 2012.
Sherwood, Larry (June 2011). "U.S. Solar Market Trends 2010"(PDF). Interstate Renewable Energy Council (IREC). Archived(PDF) from the original on September 4, 2011. Retrieved June 29, 2011.
Sherwood, Larry (July 2010). "U.S. Solar Market Trends 2009"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on September 25, 2010. Retrieved July 28, 2010.
Sherwood, Larry (July 2009). "U.S. Solar Market Trends 2008"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on November 23, 2009. Retrieved July 24, 2010.
Sherwood, Larry (July 2009). "U.S. Solar Market Trends 2008"(PDF). Interstate Renewable Energy Council (IREC). p. 16. Archived from the original(PDF) on November 23, 2009. Retrieved July 24, 2010.
Sherwood, Larry (July 2012). "U.S. Solar Market Trends 2012"(PDF). Interstate Renewable Energy Council (IREC). p. 16. Archived(PDF) from the original on October 12, 2013. Retrieved October 11, 2013.
Sherwood, Larry (July 2014). "U.S. Solar Market Trends 2013"(PDF). Interstate Renewable Energy Council (IREC). Archived(PDF) from the original on October 21, 2014. Retrieved September 26, 2014.
Sherwood, Larry (August 2012). "U.S. Solar Market Trends 2011"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on September 6, 2012. Retrieved August 17, 2012.
Sherwood, Larry (June 2011). "U.S. Solar Market Trends 2010"(PDF). Interstate Renewable Energy Council (IREC). Archived(PDF) from the original on September 4, 2011. Retrieved June 29, 2011.
Sherwood, Larry (July 2010). "U.S. Solar Market Trends 2009"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on September 25, 2010. Retrieved July 28, 2010.
Sherwood, Larry (July 2009). "U.S. Solar Market Trends 2008"(PDF). Interstate Renewable Energy Council (IREC). Archived from the original(PDF) on November 23, 2009. Retrieved July 24, 2010.
Sherwood, Larry (July 2009). "U.S. Solar Market Trends 2008"(PDF). Interstate Renewable Energy Council (IREC). p. 16. Archived from the original(PDF) on November 23, 2009. Retrieved July 24, 2010.
Sherwood, Larry (July 2012). "U.S. Solar Market Trends 2012"(PDF). Interstate Renewable Energy Council (IREC). p. 16. Archived(PDF) from the original on October 12, 2013. Retrieved October 11, 2013.
Sherwood, Larry (July 2014). "U.S. Solar Market Trends 2013"(PDF). Interstate Renewable Energy Council (IREC). Archived(PDF) from the original on October 21, 2014. Retrieved September 26, 2014.