Smith, T. Lynn  1903- <br/><br/>
Demography :  principles and methods / 
T. Lynn Smith and Paul E. Zopf 
 - Philadelphia :  F. A. Davis Co.,  1970 
 - 590 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0803679203 
<br/><br/><label>LCCN: </label>79-123781 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography