1. Vaquez: Diseases of the Heart, W. B. Saunders and Co., p. 174.
2. Bard and Curtillet, quoted by Vaquez: Diseases of Heart, p. 174.
3. Certain Types of Congenital Heart Disease Interpreted as Intracardiac A-V and V-A Fistulae;Holman;Bull. Johns Hopkins Hosp.,1925