Mary S. Booth. "Biomass Briefing, October 2009"(PDF). massenvironmentalenergy.org. Massachusetts Environmental Energy Alliance. Archived from the original(PDF) on 17 December 2010. Retrieved 12 December 2010.
Mary S. Booth. "Biomass Briefing, October 2009"(PDF). massenvironmentalenergy.org. Massachusetts Environmental Energy Alliance. Archived from the original(PDF) on 17 December 2010. Retrieved 12 December 2010.