Cahn, Robert. <br/><br/>
Facetas ;   No. 57 

 - Washington-XXU :   International Communicational Agency United States of America,   1982. 
 - p. 54-63 :   il. 
 - Trimestral 
 - No. 57(1982).  
 - Facetas ;   No. 57 .
 - International Communicational Agency United States of America. .