1. U.S. Department of Health, Education and Welfare: Facts of Life and Death, Public Health Service, National Center for Health Services, DHEW Publication No. (PHS)79–1222, November, 1978
2. U. S. Department of Health, Education and Welfare: Life Tables. Vital Statistics of the United States, 1977, Public Health Service, National Center for Health Services, DHEW Publication No. (PHS) 80–1104, Vol II, Sec 5, 1977
3. Resection for bronchial carcinoma in the elderly;Thompson Evans;Thorax,1973
4. Major pulmonary resection for bronchogenic carcinoma in the elderly;Kirsh;Ann Thorac Surg,1976
5. Surgical treatment of lung cancer in patients over the age of 70 years;Harviel;J Thorac Cardiovasc Surg,1978