@book{70469,
	author = {Grant, Eugene Lodewick, and Ireson, William Grant,},
	title = {Principles of engineering economy /},
	publisher = {Wiley,},
	year = {c1990.},
	address = {New York :},
	edition = {8th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/wiley033/89033571.html}
}