Gribbin,John <br/><br/>
Halley in 90 minutes / 
Gribbin,John. 
 - Hyderabad:  Universities press,  1997. 
 - 78p;25cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8173710716 
<br/><br/><label>Dewey Class. No.: </label>925 GRI