Le Poer Trench, Brinsley <br/><br/>
Secret of the ages :  UFOs from inside the earth / 
Brinsley Le Poer Trench 
 - Herfordshire :  Panther Books,  1976 
 - 206 p. :  ill. ;  18 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>586043071 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Unidentified flying objects