REFERENCES
- Perinatal Mortality. Statistical Bulletin issued by Metropolitan Life Insurance Company, New York, April 1956.
REFERENCES
- Nickel dermatitis. Lancet 2: 616 (September 22) 1956.
- Calnan, C. D.: Nickel dermatitis. Brit. J. Dermat. 68: 229, 1956.
- Wells, G. C.: Effects of nickel on the skin. Brit. J. Dermat. 68: 237, 1956.