Heavens, O.S.  x <br/><br/>
Optical masers.  x 

 - x 
 - London  Methuen  1964 
 - viii, 103 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics Optics 
<br/><br/><label>Dewey Class. No.: </label>548.9/HEO