@book{29892,
	author = {Humphrey, William M.,},
	title = {Introduction to servomechanism system design /},
	publisher = {Prentice-Hall},
	year = {[1973]},
	series = {Prentice-Hall series in electronic technology},
	address = {Englewood Cliffs, N.J.,},
	note = {Includes index.}
}