John <br/><br/>
Halley(1656-1742) in 90 minutes 

 - Hyderabad  Universities press  1997 
 - 78p.  pb  20cm. 
<br/><br/><label>ISBN: </label>8173710716 
<br/><br/><label>Dewey Class. No.: </label>925.2  / HAL