TY  - BOOK
AU  - World Health Organization
TI  - Oral health surveys: basic methods
U1  - 613.314 
PY  - 1971///
CY  - Geneva
PB  - World Health Oraganization
KW  - WHO
KW  - Personal health and hygiene
N1  - Gift; Dentistry; Public Health; Epidemiology
ER  -