@book{60662,
	author = {United States. and Citro, Constance F. and ebrary, Inc.},
	title = {The Bureau of Transportation Statistics},
	publisher = {National Academy Press,},
	year = {1997.},
	address = {Washington, D.C. :},
	note = {"National Research Council"--Cover.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10041027}
}