References

Executive Office of the President, Office of Management and Budget, Budget of the United States Government, Washington, DC, Annual Publication, available at http://www.gpoaccess.gov/usbudget/index.html, as May 2004.

_______ Budget of the United States Government FY 2005 - Public Budget Database, Washington, D.C., available at http://www.gpoaccess.gov/usbudget/index.html, as of May 2004.

National Aeronautics and Space Administration, Aeronautics and Space Report of the President, Washington, D.C., Annual Publication.

U.S. Department of Commerce, Bureau of the Census, Government Finance and Employment Classification Manual, Washington, D.C., available at http://www.census.gov/govs/www/index.html, as of May 2004.

________ Bureau of Economic Analysis, National Income and Product Accounts Tables, Table 3.9.4, Washington, DC, available at http://www.bea.doc.gov, as of May 2004.

U.S. Department of Transportation, Federal Aviation Administration, Budget in Brief, Washington, D.C., Annual Publication, available at http://www.faa.gov/aba/html_budget, as of May 2004.

U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, Washington, D.C., Annual Publication, available at http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubs.htm, as of May 2004.