R. Ford. Thomas . <br/><br/>
Social demography / 
Thomas R Ford, Gordon F De Jong 
 - United state :  Englewood Cliffs, N.J.,  1970. 
 - 690 p. :  ill. ;  16 cm. 
<br/><br/> Include index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social science.
<br/><br/><label>Dewey Class. No.: </label>304.6  / FOS 1970