Columbia subject headings:
Harvard subject headings:
Elena, Queen, consort of Victor Emmanuel III, King of Italy, 1873-1952.
Margherita, Queen, consort of Umberto I, King of Italy, 1851-1926
Princeton subject headings:
Elena, Queen, consort of Victor Emmanuel III, King of Italy, 1873-1952.
Margherita, Queen, consort of Umberto I, King of Italy, 1851-1926.