Columbia subject headings:
Millionaires--United States.
Money--United States.
Social classes--United States.
Wealth--United States.
Harvard subject headings:
Millionaires--United States
Money--United States
Rich people--United States
Social classes--United States
Wealth--United States
Princeton subject headings:
Millionaires--United States.
Money--United States.
Social classes--United States.
Wealth--United States.