@book{173,
	author = {Warwick, K. and Institution of Electrical Engineers.},
	title = {Industrial digital control systems /},
	publisher = {P. Peregrinus on behalf of the Institution of Electrical Engineers,},
	year = {c1988.},
	series = {IEE control engineering series ;},
	address = {London :},
	edition = {Comprehensively rev. ed.}
}