Kronzon, Itzhak. Challenging cases in echocardiography / Itzhak Kronzon, Paul A. Tunick. - Philadelphia : Lippincott Williams & Wilkins, c2005. - xv, 219 p. : ill. + Includes index. ISBN: 9780781750691;0781750695 Subjects--Topical Terms: Echocardiography National Library of Medicine Call No.: WG 141.5 / .K76 2005