Guide for selection of industrial safety equipment for eye, face and ear protection 

 - 2nd reprint August 1998 
 - New Delhi  Indian standards institution   1977 
<br/><br/><label>Subjects--Index Terms: </label>IS:8520-1977 
<br/><br/><label>Dewey Class. No.: </label>614.891/.893:658.382.3