Columbia subject headings:
Harvard subject headings:
Charity
Cooperation--Rome.
Middle class--Rome.
Poor--Rome.
Public works--Rome.
Rome--Social conditions
Water-supply--Rome.
Wealth--Moral and ethical aspects--Rome--History.
Princeton subject headings:
Charity.
Cooperation--Rome.
Middle class--Rome.
Poor--Rome.
Public works--Rome.
Rome--Social conditions.
Water-supply--Rome.
Wealth--Moral and ethical aspects--Rome--History.