Columbia subject headings:
Chemical industry--Law and legislation--Congresses.
Chemical warfare (International law)--Congresses.
Disarmament--Congresses.
Harvard subject headings:
Chemical industry--Law and legislation--Congresses.
Chemical warfare (International law)--Congresses.
Disarmament--Congresses
Princeton subject headings:
Chemical industry--Law and legislation--Congresses.
Chemical warfare (International law)--Congresses.
Disarmament--Congresses.