OH J.K.SEWARD J.B.,TAJIK, A.J. THE ECHO MANUAL / Textual Documents NULL. - 1. - NULL : BLACKWELL OXFORD , 2007. - 431 : : XI ; ; A4 . + PB. ISBN: 9788189836146 Subjects--Topical Terms: CARDIOLOGY Dewey Class. No.: 616.1 / OH/TAJ