@book{5557,
	author = {Webb, John W. and Reis, Ronald A.},
	title = {Programmable Logic Controllers : principles and applications },
	publisher = {Prentice Hall,},
	year = {1999.},
	series = {5th edition.},
	address = {[S.l.] :},
	edition = {4th ed.},
	url = {http://10.10.170.122:8080/browse/book/28722}
}