Columbia subject headings:
Harvard subject headings:
Carriers--United States.
Free enterprise--Moral and ethical aspects
Law--United States--Philosophy
Liberty
Liberty--Moral and ethical aspects.
Right of property--United States.
State, The
United States--Economic policy--Moral and ethical aspects.
United States--Social policy.
Princeton subject headings:
Carriers--United States.
Law--United States--Philosophy.
Liberty.
Right of property--United States.
State, The.