@book{13031,
	author = {Rykalin, N. and etc.},
	title = {Laser machining and welding /},
	publisher = {Elsevier,},
	year = {1980.},
	address = {[S.l.] :},
	edition = {1st ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0080227244/chopaconline-20}
}