1. Correlation of subaudible, audible and ultrasonic recordings in cardiac diagnosis;Kingsley,1965
2. Ultrasound cardiography;Edler;Acta med. scandinav.,1961
3. Echocardiography: Clinical application in mitral stenosis;Segal;J.A.M.A.,1966
4. Introduction to Radar Systems;Skolnik,1962
5. Propagation of Short Radio Waves;Kerr,1951