1. National health expenditures, 1995;Levit;Health Care Financ Rev,1996
2. Dental services: A comparison of use, expenditures and sources of payment, 1977 and 1987;Moeller,1996
3. Annual medical expenses and sources of payment for health care services;Hahn,1992
4. Source book of health insurance data,1989
5. 1984/85 dental statistics handbook,1984