Statistics of health services and of their activities: thirteenth report 

 - Geneva  World Health Organization  1969 
 - 38 p. 
 - World Health Organization Technical Report Series no. 429 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health surveys<br/>Hygiene, Public - Statistics
<br/><br/><label>Dewey Class. No.: </label>614