Boutkan, J. ABC of the ECG : a guide to electrocardiography / by J. Boutkan - Eindhoven : Centrex, 1968 - 204 p. ; 21 cm. - Philips technical library . ISBN: 4033106113 Subjects--Topical Terms: Electrocardiography National Library of Medicine Call No.: WG140 / .B749a 1968 9