Columbia subject headings:
Mackay, Marie Louise Antoinette Hungerford, 1843-1928.
Harvard subject headings:
Mackay, Marie Louise Antoinette (Hungerford) 1843-1928.
United States--Social conditions--1865-1918.
Princeton subject headings:
Mackay, Marie Louise Antoinette (Hungerford) 1843-1928.