Langill, A. W. Automatic control systems engineering / [by] A. W. Langill, Jr. - 2 volumes: illustrations; 24 cm. - Prentice-Hall international series in engineering or the physical sciences . Includes bibliographies. LCCN: 65014988 Nat. Bib. No.: GB65-19192 Subjects--Topical Terms: Automatic control. LC Class. No.: TJ213 / .L28 Dewey Class. No.: 629.8