Asimov, Isaac <br/><br/>
Pebble in the Sky / 
by Isaac Asimov. 
 - New York :  Fawcett Crest,  1957. 
 - 191 p. ;  19 cm. 
<br/><br/><label>ISBN: </label>0449234231 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science Fiction<br/>Mystery and Detective Stories