1. Dental care interval and frequency of visits, United States, July 1957–June 1959: Statistics on time interval since last dental visit and frequency of dental visits during a year by age, sex, residence, region, race, income and education,1960
2. Dental visits, volume and interval since last visit: United States, 1978 and 1979;Wilder,1982
3. Dental services and oral health: United States, 1989;Bloom,1992
4. Utilization of dental services: 1986 patterns and trends;Hayward;J Public Health Dent,1989
5. Preventive dental behavior in families: a national survey;Chen;JADA,1982