1. Heaton, L. D., et al.: Current Problems in Surgery, November, 1966.
2. Indications for Removal of Intracardiac Foreign Bodies, With Review and Report of 4 Cases;Holdefer;Ann. Surg.,1966
3. Kadis, L. B.: Unpublished data.
4. War Wounds of the Chest Among Marine and Naval Casualties in Korea;King;Surg., Gynec. & Obst.,1953