Willcox, Walter Francis,  1861-1964. <br/><br/>
Studies in American demography / 

 - New York :  Russell & Russell ;  1971 
 - xxx, 556 p. :  illus. ;  23 cm. 
<br/><br/>Bibliography: p. 541-547. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Population.
<br/><br/><label>Dewey Class. No.: </label>312.0973  / WIS  1971