Gayford, M. L.  <br/><br/>
Acoustical techniques and transducers :  loudspeakers, microphones, gramophone, pick-ups, room acoustics, vibration measurements, stereophonic reproduction / 
M. L. Gayford. 
 - London :  Macdonald & Evans,  c 1961. 
 - xx, 372 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>319  319 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Acoustical engineering.
<br/><br/><label>Dewey Class. No.: </label>620.102 / G255a