Columbia subject headings:
Detectors--Congresses.
Electronic apparatus and appliances--Congresses.
Optical detectors--Congresses.
Harvard subject headings:
Princeton subject headings:
Detectors--Congresses.
Electronic apparatus and appliances--Congresses.
Guidance systems (Flight)--Congresses.
Navigation (Aeronautics)--Congresses.
Navigation (Astronautics)--Congresses.