Ridpath, Ian. <br/><br/>
Worlds beyond :  a report on the search for life in space / 
Ian Ridpath. 
 - 1st U.S. ed. 
 - New York :  Harper & Row,  1976. 
 - 176 p. :  ill. ;  30 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 172. 
<br/><br/><label>ISBN: </label>0060135689 :  $6.95 
<br/><br/><label>LCCN: </label>75030344  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life on other planets.<br/>Astronomy--Popular works.
<br/><br/><label>LC Class. No.: </label>QB54  / RID 1976 
<br/><br/><label>Dewey Class. No.: </label>574.999