Race and social difference:  selected readings / 
edited by Paul Baxter and Basil Sansom. 
 - Harmondsworth:  Penguin Books,  1972. 
 - 495 p. :  ill. ;  18 cm. 
<br/><br/>Includes index and references: p. 469-473. 
<br/><br/><label>ISBN: </label>0140806946 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Race.<br/>Race relations.