Columbia subject headings:
Harvard subject headings:
Bell, Alexander Graham, 1847-1922
Bell, Mabel Gardiner Hubbard, 1857-1923
Deaf--United States--Biography
Inventors--United States--Biography
Wives--United States--Biography.
Princeton subject headings:
Bell, Mabel Gardiner Hubbard, 1859-1963--Correspondence.
Bell, Mabel Gardiner Hubbard, 1859-1963.
Deaf--Biography.