@book{3155,
	author = {Hoffman, Edward G.},
	title = {Practical Problems In Mathematics For Machinists /},
	publisher = {Delmar Pub,},
	year = {1988.},
	address = {New York:},
	edition = {3rd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0827325592/chopaconline-20}
}