Verschuur, G. L. <br/><br/>
Impact  the threat of comets and asteriods 
G. L. Verschuur                                               
 - Newyork  Oxford University Press  1996 
 - xii, 237p. 
<br/><br/><label>ISBN: </label>0-19-511919-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asteriods<br/>Comets
<br/><br/><label>Universal Decimal Class. No.: </label>523.64  / VER