Columbia subject headings:
Edison, Thomas A. (Thomas Alva), 1847-1931--Archives.
Edison, Thomas A. (Thomas Alva), 1847-1931.
Inventors--United States--Biography.
Harvard subject headings:
Biographies
Communication--United States--History--Sources.
Edison, Thomas A. (Thomas Alva), 1847-1931
Edison, Thomas A. (Thomas Alva), 1847-1931--Archives.
Edison, Thomas A. (Thomas Alva), 1847-1931--Correspondence.
Electricity--History--Sources.
Inventors--United States--Biography
Inventors--United States--Correspondence.
Radiography--United States--History--Sources.
Sound--Recording and reproducing--United States--History--Sources.
Telegraph--United States--History--Sources.
Telephone--United States--History--Sources.
Princeton subject headings:
Edison, Thomas A. (Thomas Alva), 1847-1931--Archives.
Edison, Thomas A. (Thomas Alva), 1847-1931.
Inventors--United States--Biography.