Columbia subject headings:
Bell, Alexander Graham, 1847-1922.
Inventors--Scotland--Biography.
Inventors--United States--Biography.
Telephone--United States--History.
Harvard subject headings:
Bell, Alexander Graham, 1847-1922
Inventors--Scotland--Biography.
Princeton subject headings:
Inventors--Scotland--Biography.
Inventors--United States--Biography.
Telephone--United States--History.