Crowther, J. G.  1899- <br/><br/>
Radioastronomy and radar / 
J. G. Crowther ; illustrated by David D. A. Hardy 
 - [Rev. ed.] 
 - London :  Methuen,  1958 
 - 64 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio astronomy--Juvenile literature<br/>Radar--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>621.384