Duncan, Hannibal Gerald <br/><br/>
Race and population problems 

 - New York  Negro universities press  1929 
 - xviii, 424p.; 23cm. 
<br/><br/><label>ISBN: </label>837119030 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birth control<br/>Population planning<br/>Population policy