TY - BOOK ED - Joint ILO/WHO Committee on Occupational Health. ED - World Health Organization. ED - International Labour Organization. TI - 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] SN - 924120415X PY - 1969/// CY - Geneva PB - World Health Organization KW - Air pollution KW - Occupational diseases KW - prevention and control KW - Environmental exposure KW - Maximum allowable concentration UR - http://apps.who.int/iris/ ER -