Population theory and policy :  selected reading / 
edited by Joseph J. Spengler and Otis Dudley Duncan. 
 - Glencoe, Ill. :  Free Press,  1956. 
 - x, 522 p. :  diagrs., tables ;  24 cm. 
<br/><br/>Bibliography: p. 510-519. 
<br/><br/><label>LCCN: </label>56-010584 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population