1431. Letter sent by the Surgeon Generals of the Army, Navy, and the U. S. Public Health Service to physicians in the Armed Forces (Number 7, April 5, 1943)
1432. Letter sent by the Surgeon Generals of the Army, Navy, and the U. S. Public Health Service to physicians in the Armed Forces (Number 8, April 16, 1943)
1433. Letter sent by the Surgeon Generals of the Army, Navy, and the U. S. Public Health Service to physicians in the Armed Forces (Number 9, May 1, 1943)