| API 1999 |
"The State of Domestic Oil and Natural Gas Industry." American Petroleum Institute, March 1999. |
| BEA 2002 |
Bureau of Economic Analysis Regional Accounts Data 2002 |
| BLS 2001 |
Data from Industry Productivity Database. Bureau of Labor Statistics. U.S. Department of Labor. 2001. |
| BLS 1996 |
Data from Industry Productivity Database. Bureau of Labor Statistics. U.S. Department of Labor. 1996. |
| DOC 2001 |
Census of Manufactures 2001. U.S. Department of Commerce. |
| DOC 2001b |
Annual Survey of Manufactures Geographic Area Statistics 2001. U.S. Department of Commerce. |
| DOC 1997 |
Census of Manufactures 1997. U.S. Department of Commerce. |
| DOC 1996 |
1996 Annual Survey of Manufactures. U.S. Department of Commerce. |
| DOC 1994 |
Pollution Abatement Expenditures, 1994. U.S. Department of Commerce. |
| DOC 1993 |
Annual Survey of Manufactures 1993. U.S. Department of Commerce. |
| DOE/EIA 2000 |
Petroleum Supply Annual. Volume 1. U.S. Department of Energy. Energy Information Administration. June 2000. |
| DOE 2000 |
Annual Energy Review 2000. U.S. Department of Energy. Energy Information Administration. 2000. |
| DOE 1998 |
Energy and Environmental Profile of the U.S. Petroleum Refining Industry. U.S. DOE/OIT, December 1998. |
| DOE 1998b |
Annual Energy Review 1998. U.S. Department of Energy. Energy Information Administration. 1998. |
| ITA 2001 |
U.S. Industry Sector Data from the International Trade Administration. U.S. Department of Commerce. 2001. |
| MECS 1998 |
Manufacturing Energy Consumption Survey. Energy Information Administration. 2001. |
| MECS 1994 |
Manufacturing Energy Consumption Survey. Energy Information Administration. 1997. |
| MECS 1991 |
Manufacturing Energy Consumption Survey. Energy Information Administration. 1994. |
| MECS 1988 |
Manufacturing Energy Consumption Survey. Energy Information Administration. 1991. |
| MECS 1985 |
Manufacturing Energy Consumption Survey. Energy Information Administration. 1988. |
| NSF 1997 |
Research and Development in Industry: 1997. National Science Foundation. |
| NSF 1997 |
Research and Development in Industry: 1997. National Science Foundation |
| OGJ 1998 |
Forecast and Review, Oil and Gas Journal. January 26, 1998. |
| OGJ 1997 |
Worldwide Refining Report, Oil and Gas Journal. December 12, 1997. |
| OMB 1997 |
North American Industry Classification System United States 1997. Executive Office of the President, Office of Management and Budget. |
| OMB 1987 |
Standard Industrial Classifications Manual 1987. Executive Office of the President, Office of Management and Budget. |
