Columbia subject headings:
Electrical engineering--Research--History--Bibliography.
Electromagnetism--Research--History--Bibliography.
Radio--History--Bibliography.
Telegraph, Wireless--History--Bibliography.
Harvard subject headings:
Charge transfer devices (Electronics)--Bibliography.
Electrostatics--Bibliography.
Signal processing--Bibliography.
Signal processing--Equipment and supplies--Bibliography.
Signal theory (Telecommunication)--Bibliography.
Princeton subject headings:
Electrical engineering--Research--History--Bibliography.
Electromagnetism--Research--History--Bibliography.
Radio--History--Bibliography.
Telegraph, Wireless--History--Bibliography.