TY  - GEN
AU  - World Health Organization
ED  - WHO Scientific Group on Epidemiology, Etiology, and Prevention of Periodontal Diseases (1977 : Moscow).
TI  - Epidemiology, etiology, and prevention of periodontal diseases : report of a WHO scientific group [meeting held in Moscow from 23 November to 2 December 1977]
T2  - (WHO technical report series ; 621)
SN  - 92-4-120621-7
PY  - 1978///
CY  - Geneva : 
PB  - World Health Organization
KW  - Periodontal diseases
ER  -