Un Paseo por el universo 
/ SEP 
 - Mexico  : SEP  , [1984?] 
 - sp.  il.  ; 40.00 
<br/><br/><label>ISBN: </label>968-29-0516-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomia
<br/><br/><label>Dewey Class. No.: </label>INF 520 SEP