Recommended health-based limits in occupational exposure to selected mineral dusts (silica, coal : report of a WHO study group [meeting held in Geneva from 6 to 12 March 1984]. 

 - 82p. 
 - (WHO technical report series ; 734) .
<br/><br/><label>ISBN: </label>92-4-120734-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental exposure<br/>Occupational diseases--Prevention and control<br/>Silicon dioxide<br/>Coal