Columbia subject headings:
Aerosols--Environmental aspects.
Aerosols--Health aspects.
Air--Microbiology.
Air--Pollution.
Biological weapons--Detection--Measurement.
Harvard subject headings:
Princeton subject headings:
Aerosols--Environmental aspects.
Aerosols--Health aspects.
Air--Microbiology.
Air--Pollution.
Biological weapons--Detection--Measurement.