United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 254
Fig. 2. Outline drawing traced from the long distanceradiograph supplemented by stereoscopic examination. Theposition of each valve, except the aortic is indicated by itsinitial letter. The aortic orifice Is indicated by the begin-ning of the aorta. 246 … Fig. 3. Lateral projection showing relative depth of valves of heart.
