Asimov, Isaac  , 1920-1992 <br/><br/>
Civilizaciones extraterrestres 
/ Isaac Asimov 
 - Mexico  : Edivision Compaņia Editorial  , c1980. 
 - 335p. pb.  : il. 
<br/><br/><label>ISBN: </label>968-13-0562-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extraterrestres
<br/><br/><label>Dewey Class. No.: </label>001.94 ASI