Hampton, John R. 150 ECG problems / John R. Hampton. - 4th ed. - Edinburgh : Churchill Livingstone Elsevier, 2013 - ix, 310 p. : ill. Includes index. ISBN: 9780702046452;9780702046711 (international) Subjects--Topical Terms: Electrocardiography National Library of Medicine Call No.: WG 18.2 / .H36 2013