1. National income and product accounts – NIPAs, section 1 all tables. GDP and other major NIPA aggregates;Bureau of Economic Analysis (BEA),2011
2. 1994 manufacturing consumption of energy 1994;Energy Information Administration (EIA),1997
3. 1998 manufacturing consumption of energy,2001
4. 2002 manufacturing energy consumption survey on manufacturing and industrial energy uses and costs;Energy Information Administration (EIA),2005
5. 2006 manufacturing energy consumption survey on manufacturing and industrial energy uses and costs;Energy Information Administration (EIA),2009