TY - GEN AU - World Health Organization ED - WHO Expert Committee on Health Statistics (1972 : Geneva). TI - Statistical principles in public health field studies : fifteenth report of the WHO Expert Committee on Health Statistics [meeting held in Geneva from 21 to 27 March 1972] T2 - (WHO technical report series ; 510) SN - 92-4-120510-5 PY - 1972/// CY - Geneva : PB - World Health Organization KW - Statistics KW - Public health ER -