Flügge-Lotz, Irmgard Discontinuous automatic control. - Princeton, N.J.: Princeton University Press, 1953. - 168 p.: illus.; 25 cm. LCCN: 52013156 /L Nat. Bib. No.: GB54-2338 Subjects--Topical Terms: Automatic control. Dewey Class. No.: 621.8 / F648d