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]. 

 - 32p. 
 - (WHO technical report series ; 510) .
<br/><br/><label>ISBN: </label>92-4-120510-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics<br/>Public health