Columbia subject headings:
Automobiles--Fuel consumption--Law and legislation--United States--Cost effectiveness.
Automobiles--Motors--Exhaust gas--Law and legislation--Cost effectiveness.
Automobiles--Safety regulations--United States--Cost effectiveness.
Harvard subject headings:
Automobile industry and trade--Law and legislation--United States
Automobile industry and trade--United States
Automobiles--Fuel consumption--Law and legislation--United States--Cost effectiveness.
Automobiles--Law and legislation--United States
Automobiles--Motors--Exhaust gas--Law and legislation--Cost effectiveness.
Automobiles--Safety regulations--United States--Cost effectiveness.
Princeton subject headings:
Automobile industry and trade--Law and legislation--United States.
Automobile industry and trade--United States.
Automobiles--Law and legislation--United States.
Automobiles--United States.