1. The Heart and the Aorta;Vaquez,1920
2. The Diagnostic Value of the Orthodiagram in Heart Disease;Van Zwaluwenberg;Arch. Int. Med.,1911
3. Levene and Reid: The Differential Diagnosis of Organic Heart Disease by Means of the Roentgen Ray, Am. J. Roentgenol., in press.
4. Reid and Levene: Roentgenologic Consideration of Mitral Heart Disease, New England J. Med., in press.