Smith, David <br/><br/>
Mathematical demography   
by David Smith, Nathan Keyfitz 
 - Berlin  Springer-Verlag  1977 
 - xi, 514p. 
 - Biomathematics  V.6 .
<br/><br/><label>ISBN: </label>3540078991 
<br/><br/><label>Dewey Class. No.: </label>519.5  / N77