Gribbin, John R. <br/><br/>
Fire on earth :  doomsday, dinosaurs, and human kind / 
John and Mary Gribbin. 
 - New York :  St. Martin's Press,  c1996. 
 - xv, 264 p. 
<br/><br/> Includes bibliography and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asteroids<br/>Comets<br/>Catastrophes (Geology)