00000cam a22000004a 4500 UP-1685523046125097457 Buklod 20230503092606.0 m o j ta 991231s1980 xx r |||| u|eng|| 9221023265 (iLib)UPMNL-00000020935 RC967 O22 1980 International Labour Office. Occupational exposure limits for airborne toxic substances a tabular compilation of values from selected countries 83143227. Exposure limits for airborne toxic substances Geneva International Labour Office 1980 vi, 290, [24] p. ill. 21 x 29 cm. Air Pollution Toxicology Tables. Industrial hygiene. Threshold limit values (Industrial toxicology) Tables. CPH-11361 UPMNL CPH RC967 O22 1980 Book