Towards a system of social of social and demographic statistics 
By United Nations 
 - New York  United Nations  1975 
 - 187p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time management surveys<br/>Social indicators<br/>Demography - Methodology
<br/><br/><label>Dewey Class. No.: </label>I5511 Un3