REFERENCES
- Christianson, H. B.: Office dermatology. Postgrad Med 38: 30–35 (July) 1965.
- Pillsbury, D. M., Shelly, W. B. and Kligman, A. M.: Dermatology. Philadelphia, W. B. Saunders Company, 1956.
- Sutton. R. L., Jr.: Diseases of the Skin. Ed. 11. St. Louis, The C. V. Mosby Company, 1956.
- Lever, W. F.: Histopathology of the Skin. Ed. 3. Philadelphia, J. B. Lippincott Company, 1954.