1. Das aufgabengebiet eines hauptberoflichen zahnarztes in der chemischen gross industrie (The duties of a dentist employed on a regular basis in the chemical industry);Heering;Zb1 Arbeitsmed,1969
2. Periodontal treatment need in a Finnish industrial population;Markkanen;Community Dent Oral Epidemiol,1978
3. Assessment of a preventive dentistry programme in private practice;Barnard;NZ Dent J,1974
4. The dental care of the adolescent: the Marks and Spencer scheme;Balderston;R Soc Health J,1968