<b>Source</b>: "<a rel="nofollow" class="external text" href="http://hazmat.dot.gov/pubs/erg/erg2004.pdf">Emergency Response Guidebook</a>." U.S. Department of Transportation, 2004, pages 16-17.
Government of the United States
"<a rel="nofollow" class="external text" href="http://hazmat.dot.gov/pubs/erg/erg2004.pdf">Emergency Response Guidebook</a>." U.S. Department of Transportation, 2004, pages 16-17.