Butrica, Andrew J. <br/><br/>
To see the unseen :  a history of planetary radar astronomy / 
by Andrew J. Butrica. 
 - Washington, DC :  National Aeronautics and Space Administration,  1996. 
 - xiii, 301 p. :  ill. ;  25 cm. 
 - The NASA history series NASA SP ;  4218 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>LCCN: </label>95035890 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Planetology--United States.<br/>Planets--Exploration.<br/>Radar in astronomy.
<br/><br/><label>LC Class. No.: </label>QB602.9  / .B87 1996 
<br/><br/><label>Dewey Class. No.: </label>523.2/028