Keyfitz, N. <br/><br/>
Population:   facts and methods of demography/ 

 - San Francisco :  W. H. Freeman,  1971 
 - x, 613p. :  ill. ;  25 cm. 
<br/><br/> includes index and bibliographical references 
<br/><br/><label>ISBN: </label>0716709317 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography--Mathematical models.<br/>Population--Statistics.
<br/><br/><label>LC Class. No.: </label>DUCE HB885.K43