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2. Chronic left ventricular bypass with an implantable ventricular-aortic assist pump;Bernhard;Circulation,1969
3. Artificial heart program conference: proceedings June 9-13;Hastings,1969
4. An implantable abdominal left ventricular assist device (LVAD) (abstract);Norman;Clin Res,1972
5. An intracorporeal (abdominal) left ventricular assist device: XX: Précis and state-of-the-art, chap 109;Norman,1977