Pitman, R. J. G. Automatic control systems explained / R. J. G. Pitman. - London : Melbourne : New York : Macmillan, St. Martin's P., 1966 - vii, 165 p. tables, diagrs. 22 1/2 cm. includes index Subjects--Topical Terms: Automatic control. Dewey Class. No.: 629.8 / P685