Brockelsby, C.F. Ultrasonic delay lines/ C.F. Brockelsby, J.S. Palfreman and R.W. Gibson - London: liffe Books, 1963 - 297; 23 cm. Includes index ISBN: Rs. 63.00 Subjects--Topical Terms: Ultrasonic wavesElectronicsDelay linesElectric waves Dewey Class. No.: 621.38