Verschurr, Gerritt L. <br/><br/>
Impact : the threat of comets and asteroids 

 - New York  Oxford University Press  1996 
 - 327 
<br/><br/><label>ISBN: </label>0195119193 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asteroids<br/>Comets<br/>Earth<br/>Evolution (Biology)
<br/><br/><label>Dewey Class. No.: </label>551.397 V614i