Permissible levels of occupational exposure to airborne toxic substances : sixth report of the Joint ILO/WHO Committee on Occupational Health [meeting held in Geneva from 4 to 10 June 1968]. 

 - 16p. 
 - (WHO technical report series ; 415) .
<br/><br/><label>ISBN: </label>92-4-120415-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air pollution<br/>Occupational diseases--Prevention and control<br/>Environmental exposure<br/>Maximum allowable concentration