Columbia subject headings:
Infrared radiation--Congresses.
Millimeter waves--Congresses.
Optics--Congresses.
Harvard subject headings:
Electrooptical devices--Atmospheric effects--Congresses.
Infrared radiation--Atmospheric effects--Congresses.
Millimeter waves--Atmospheric effects--Congresses.
Princeton subject headings:
Infrared radiation--Congresses.
Millimeter waves--Congresses.
Optics--Congresses.