1. I. Durant W: What is civilization? As cited in Bartlett J: Familiar quotations. Boston 1980 Little Brown p 789
2. National health expenditures, 1982;Gibson RM;Health Care Financing Review,1983
3. $1,459 a year;The;Washington Post,1984
4. medical bill rises to $322 billion, 10.5 percent of GNP;Nation's;Washington Post,1983
5. Weisbrod BA: Economics and medical research. Washington DC 1983 American Enterprise Institute pp 32 37