1. Diagnostic use of ultrasound in heart disease;Edler;Acta Med Scand Suppl,1955
2. Echocardiography;Feigenbaum,1972
3. Echocardiographic evaluation in pericardial effusion;Teichholz,1975
4. Anatomy of the Human Body;Gray,1973
5. Further echocardiographic observations in pericardial effusion;Lemire,1976