Columbia subject headings:
National Research Council of Canada. Radio and Electrical Engineering Division--History.
Radar--Canada--History.
Harvard subject headings:
National Research Council of Canada. Radio and Electrical Engineering Division--History.
Radar--Canada--History.
Radar--Military applications--Canada--History.
Princeton subject headings:
National Research Council of Canada. Radio and Electrical Engineerinivision--History.
Radar--Canada--History.