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2. The diagnostic use of ultrasound in heart disease;Edler;Acta Med. Scandinav,1955
3. Use of ultrasound in the diagnosis of pericardial effusion;Feigenbaum;Ann. Intern. Med.,1966
4. The echocardiogram: An ultrasound technique for the detection of pericardial effusion;Moss;New Eng. J. Med.,1966
5. Ultrasonic diagnosis of pericardial effusion;Rothman;Circulation,1967