Columbia subject headings:
Harvard subject headings:
European Parliament. Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the member states concerning equipment and protective systems intended for use in potentially explosive atmospheres.
Hazardous substances--Law and legislation--European Union countries.
Princeton subject headings:
Environmental protection--Machinery--European Union countries.
Flammable materials--Law and legislation--European Union countries.
Hazardous substances--European Union countries--Safety measures.
Hazardous substances--Law and legislation--European Union countries.