1. US Department of Transportation. Departmentwide program evaluation of the hazardous materials transportation programs. 2000. http://hazmat.dot.gov/hmpe_report.pdf
2. Transport Canada. Emergency response guidebook 2000. 2000. Download from http://www.tc.gc.ca/canutec/en/guide/guide.htm
3. Lapalme R. Personal Communication. 2003.
4. US National Transportation Safety Board. Safety recommendation. R-99-7 through-10. 1999. Download from http://hazmat.dot.gov/ntsb_safety.htm
5. US National Transportation Safety Board. Safety recommendation. R-01-22. 2001. Download from http://hazmat.dot.gov/ntsb_safety.htm