@book{33546,
	author = {National Research Council (U.S.). and ebrary, Inc.},
	title = {Vessel navigation and traffic services for safe and efficient ports and waterways},
	publisher = {National Academy Press,},
	year = {1996.},
	address = {Washington, DC :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10071942}
}