Ford, Brian J. <br/><br/>
The earth watchers / 
by Brian J. Ford 
 - London :  Leslie Frewin,  1973 
 - 189, 20 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>085632020X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Unidentified flying objects<br/>Life on other planets