Personal hearing protection in industry/ 
Editor, P. W. Alberti. 
 - New York:  Raven Press,  1982. 
 - 605 pages :  illustrations ;  24 cm. 
<br/><br/> Papers presented at an international symposium, University of Toronto, May 1980. 
<br/><br/><label>ISBN: </label>0890046980 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational medicine--Congresses.<br/>Ear Protective Devices--congresses.