Code of practice for reducing the exposure of employed persons to noise 
by Her Majesty's 
 - London  Her Majesty's  1972 
 - 33p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Noise --Measurement.<br/>Noise control
<br/><br/><label>Dewey Class. No.: </label>X93x42 Un3 c