Hoffman, A. S.  1938, <br/><br/>
A real-time optical spectrum analyzer / 
[by] Alan S. Hoffman 
 - 20 pages ;  28 cm. 
 - The Rand paper series;  P-5060 .
 - The Rand paper series;  P-5060 .
<br/><br/>Includes bibliographical references  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vocoder.<br/>Spectrum analyzers.<br/>Optical instruments.