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Encuentro con Saturno. 

 - Washington-XXU :   International Communicational Agency United States of America,   1981. 
 - p. 12-17 :   il. 
 - Trimestral 
 - No. 53(1981).  
 - Facetas ;   No. 53 .
 - International Communicational Agency United States of America. .
<br/><br/><br/>Espaņol.