Colby M Y <br/><br/>
College course in sound waves and acoustics 
by Colby M Y 
 -  1934 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>74872 
<br/><br/><label>Source: </label> Textbook 
<br/><br/><label>Dewey Class. No.: </label>C3:7, G4