Permissible levels of toxic substances in the working environment : 6th session of the Joint ILO/WHO Committee on Occupational Health, Geneva, 4-10 June 1968. - Geneva : International Labour Office, [1970] - iii, 405 p. : ill. ; 24 cm. - Its occupational safety and health series no. 20 .


Air--Analysis.
Industrial toxicology.
Air--Pollution--Standards.
Air--Pollution--Measurement.
Chemicals--Safety measures.
Environmental health.
Industrial hygiene.

628.532 / ILO Ref.