Barber, Benjam¡n R. <br/><br/>
Facetas ;   No. 53 

 - Washington-XXU :   International Communicational Agency United States of America,   1981. 
 - p. 74-76 :   il. 
 - Trimestral 
 - No. 53(1981).  
 - Facetas ;   No. 53 .
 - International Communicational Agency United States of America. .