Websites
- National Academy of Sciences. National Research Council, Renewable Fuel Standard: potential economic effects of US biofuel policy. www.dels.nas.edu/resources/static-assets/materials-based-on-reports/reports-in-brief/Renewable-Fuel-Standard-Final.pdf
- US Congress, National Energy Conservation Policy Act, Public Law 95–619, 95th Congress (1977–1978), H.R.5037, Washington, DC, USA (1978). www.eric.ed.gov/PDFS/ED166022.pdf