1. Essentials of Electrocardiography;Ashman,1937
2. The Fundamentals of Electrocardiographic Interpretation;Carter,1937
3. Nomenclature and Criteria for Diagnosis of Diseases of the Heart;Criteria Committee,1940
4. Electrocardiography in Practice;Graybiel,1941
5. The Electrocardiographic Records of 2,000 R.C.A.F. Aircrew;Hall;Canad. M. A. J.,1940