Greenlees A E <br/><br/>
Amplification and distribution of sound 

 - 3 
 -  1954 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>71675 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical engineering
<br/><br/><label>Dewey Class. No.: </label>D6660C3, J4