REFERENCE
- Indicators. United States Department of Health, Education, and Welfare. Washington, D. C., Government Printing Office, May 1962.
REFERENCE
- Nissen, R.: Surgery of today and yesteryear. J. Internat. Coll. Surgeons 36: 672–676 (November) 1961.
REFERENCE
- Roberts, J. A. F.: Genetic prognosis. Brit. M. J. 1: 587–592 (March 3) 1962.