00638nam a2200181Ia 450000500170000000800410001702000180005803500090007604100080008508200100009310000300010324501580013326000530029130000070034450000090035150500560036065000400041620260808125512.0260808s9999||||xx |||||||||||||| ||und||  a92-4-157170-5  a6532  aENG  a614.8  aWorld Health Organization 0aIPCS (Environmental health criteria no - 170)bassessing human health risks of chemicals - derivation of guidance values for health based exposure limits  aGenevabUNEP and World Health Organizationc1994  a73  aGift  aIPCS, public health, chemical hazards, epidemiology  aIPCSbPublic health -- Epidemiology