Columbia subject headings:
Astor, Caroline Schermerhorn, 1830-1908.
Etiquette--New York (State)--New York--History.
New York (N.Y.)--Biography.
New York (N.Y.)--History--1865-1898.
New York (N.Y.)--Social life and customs--19th century.
Rich people--New York (State)--New York--Biography.
Wealth--Social aspects--New York (State)--New York--History--19th century.
Harvard subject headings:
Astor, Caroline Schermerhorn, 1830-1908.
Etiquette--New York (State)--New York--History.
New York (N.Y.)--Biography
New York (N.Y.)--History--1865-1898
New York (N.Y.)--Social life and customs--19th century
Rich people--New York (State)--New York--Biography.
Wealth--Social aspects--New York (State)--New York--History--19th century.
Princeton subject headings:
Astor, Caroline Schermerhorn, 1830-1908.
Etiquette--New York (State)--New York--History.
New York (N.Y.)--Biography.
New York (N.Y.)--History--1865-1898.
New York (N.Y.)--Social life and customs--19th century.
Rich people--New York (State)--New York--Biography.
Wealth--Social aspects--New York (State)--New York--History--19th century.