1. THE NATURAL HISTORY OF RHEUMATIC CARDIAC DISEASE: A STATISTICAL STUDY
2. Comroe B. I.: Arthritis, 3rd ed., Philadelphia, Lea and Febiger, 1944, pp. 758 and 760.
3. THE PREVENTION OF STREPTOCOCCAL UPPER RESPIRATORY INFECTIONS AND RHEUMATIC RECURRENCES IN RHEUMATIC CHILDREN BY THE PROPHYLACTIC USE OF SULFANILAMIDE 1
4. Lichtwitz L.: Rheumatic Fever, New York, Grune and Stratton, 1944, p. 174.
5. Swift Homer F.: Chapter in Cecil's Textbook of Medicine, 6th ed., Philadelphia, W. B. Saunders Co., 1945, pp. 438 and 439.