@book{1872,
	author = {Farwell, Robert F. and Schmitt, Neil M.},
	title = {Understanding automation systems /},
	publisher = {Sams,},
	year = {1986.},
	address = {[S.l.] :},
	edition = {2nd Revised edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0672270145/chopaconline-20}
}