Columbia subject headings:
Combustion gases--Toxicology--Congresses.
Fires--Congresses.
Smoke--Congresses.
Harvard subject headings:
Combustion gases--Toxicology--Congresses.
Fires--Congresses.
Smoke--Congresses.
Princeton subject headings:
Combustion gases--Toxicology--Congresses.
Fires--Congresses.
Smoke--Congresses.