00322pam a2200121a 44500008004100000020002400041082001600065100002700081245003800108250001200146260003200158300001000190230405s1991    xxu||||| |||| 00| 0 eng d  a8171791859cRs. 160  a616.12bCON  aConover, Mary Boudreau  aUnderstanding Electrocardiography  a5th Ed.  aNew DelhibJaypee Pubc1991  a461 p