1. Cobb, Stanley, (a) “Perspectives in Biology and Medicine”, 3, 383 (1960); (b) “Epilepsia”, 1, 394 (1960).
2. Audubon, J. J., “Ornithological Bibliography” (A. and C. Black, Edinburgh, 1831–1839).
3. Michelsen, W. J., Science, 130, 630 (1959).
4. Bang, B. G., and Bang, F. B., Bull. Johns Hopkins Hosp., 104, 107 (1959).
5. Hopkins, C. L., Auk, 5, 248 (1888).