found: Boop-oop-a-doop [MP] 1932, 1935?(name not given)
found: Enchanted drawings, 1989:p. 75 (Mae Questel assumed role of Betty Boop in 1931 and did voice for all cartoons through end of series in 1939)
found: The biographical encyclopedia & who's who of the American theatre, 1966, c1965:p. 756 (Questel, Mae; b. 1910 in Bronx, N.Y.; voice of cartoon characters, theatre, film and television actress)
found: Washington Post, Jan. 9, 1998:obit. (d. Jan. 4, 1998, in NYC)
found: Voice of Betty Boop, Mae Questel, 2016.
