Peebles, Curtis. <br/><br/>
Guardians :  strategic reconnaissance satellites / 
Curtis Peebles. 
 - London, :Ian Alan,  1987. 
 - viii, 418 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0711017654 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space surveillance.<br/>Artificial satellites in remote sensing.
<br/><br/><label>LC Class. No.: </label>UG1520  / PEE