Mayer, Lawrence A. <br/><br/>
Dormir...soņar. 

 - Washington-XXU :   U.S. Information Agency,   1977. 
 - p. 54-57 :   il. 
 - Bimestral 
 - No. 19(1977) 
 - Horizonte Usa ;   No. 19 .
 - U.S. Information Agency. .
<br/><br/><br/>Espaņol.