The UFO phenomenon 

 - Alexandria  Time-Life Books  1987 
 - 160p. : col. ill. 
 - Mysteries of the unknown .
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>809463245 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flying objects<br/>UFO phenomenon<br/>Unidentified flying objects