H. Arthur Klein. <br/><br/>
Masers and Lasers / 
Klein, H. Arthur ; edited Helen Hale ; illustrated by Frank Aloise. 
 - London :  George Allen and Unwin,  c 1967. 
 - 184 p. :  ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/>337  337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Masers--Juvenile literature.
<br/><br/><label>Dewey Class. No.: </label>535.2 / K673m