Columbia subject headings:
Edison, Thomas A. (Thomas Alva), 1847-1931.
Incandescent lamps.
Harvard subject headings:
Edison, Thomas A. (Thomas Alva), 1847-1931
Incandescent lamps
Incandescent lamps--History.
Inventors--United States--Biography
Princeton subject headings:
Edison, Thomas A. (Thomas Alva), 1847-1931.
Incandescent lamps.