Columbia subject headings:
Callas, Maria, 1923-1977--Archives--Exhibitions.
Callas, Maria, 1923-1977--Portraits--Exhibitions.
Sopranos (Singers)--Biography--Exhibitions.
Harvard subject headings:
Callas, Maria, 1923-1977--Archives--Exhibitions.
Callas, Maria, 1923-1977--Portraits--Exhibitions.
Sopranos (Singers)--Biography--Exhibitions.
Princeton subject headings:
Callas, Maria, 1923-1977--Archives--Exhibitions.
Callas, Maria, 1923-1977--Portraits--Exhibitions.
Sopranos (Singers)--Biography--Exhibitions.