Columbia subject headings:
Optical detectors--Congresses.
Optical radiometry--Congresses.
Radiometers--Congresses.
Harvard subject headings:
Optical detectors--Congresses.
Optical radiometry--Congresses.
Radiometers--Congresses.
Princeton subject headings:
Optical detectors--Congresses.
Optical radiometry--Congresses.
Radiometers--Congresses.