Guidelines for statistics on children and youth. 

 - New York :    United Nations,    1971. 
 - 82 p. ;    28 cm. 
<br/><br/>  "United Nations publication. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Children -- Statistical methods.<br/> Youth -- Statistical methods.