Keyfitz, Nathan,  1913- <br/><br/>
Introduction to the mathematics of population / 
Nathan Keyfitz 
 - Reading, Mass. :  Addison-Wesley,  1968 
 - xiv, 450 p. :  ill. ;  25 cm. 
<br/><br/>Bibliography: p. 413-431. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography--Mathematical models