Columbia subject headings:
Harvard subject headings:
Aerosols--Environmental aspects--Congresses.
Aerosols--Environmental aspects.
Air--Pollution--Congresses
Atmospheric ozone--Congresses.
Atmospheric ozone.
Chlorofluorocarbons--Environmental aspects--Congresses.
Fluorocarbons--Environmental aspects.
Fluorocarbons--Industrial applications.
Stratosphere
Stratosphere--Congresses
Princeton subject headings:
Aerosols--Environmental aspects--Congresses.
Air--Pollution--Congresses.
Atmospheric ozone--Congresses.
Chlorofluorocarbons--Environmental aspects--Congresses.
Stratosphere--Congresses.