@book{253480,
	author = {Law Enforcement Standards Laboratory, and National Institute of Justice (U.S.),},
	title = {NIJ standard for ballistic helmets :},
	publisher = {U.S. Department of Justice, National Institute of Justice,},
	year = {1981.},
	series = {NIJ standard ;},
	address = {Washington, D.C. :},
	note = {Title from title screen (viewed July 19, 2016).},
	url = {http://purl.fdlp.gov/GPO/gpo61173}
}