@book{12793,
	author = {Luzadder, Warren J. and Botkin, K.E.},
	title = {Problems in engineering drawing /},
	publisher = {Prentice Hall,},
	year = {1986.},
	series = {V. 1.},
	address = {[S.l.] :},
	edition = {8th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0137163738/chopaconline-20}
}