@book{45503,
	author = {Helm, John L. and ebrary, Inc.},
	title = {Energy},
	publisher = {National Academy Press,},
	year = {1990.},
	address = {Washington, D.C. :},
	note = {"National Academy of Engineering."},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10060389}
}