Heavens, O. S. <br/><br/>
Optical masers / 
O.S. Heavens. 
 - London  ;  New York :  Methuen ; John Wiley & Sons,  c1964. 
 - viii, 103 p. :  ill. ;  21 cm.. 
 - Methuen's monographs on physical subjects. .
 - Methuen's monographs on physical subjects. .
<br/><br/> Includes  index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lasers.   <br/>Masers. 
<br/><br/><label>Dewey Class. No.: </label>621.366  / HEO 1964