Columbia subject headings:
Agricultural pests--Control--Economic aspects--United States.
Bromomethane--Environmental aspects--United States.
Bromomethane--Law and legislation--United States.
Ozone layer depletion--Law and legislation--United States.
Ozone-depleting substances--Government policy--United States.
Harvard subject headings:
Agricultural pests--Control--Economic aspects--United States.
Bromomethane--Environmental aspects--United States.
Bromomethane--Law and legislation--United States.
Ozone layer depletion--Law and legislation--United States.
Ozone-depleting substances--Government policy--United States.
Princeton subject headings:
Agricultural pests--Control--Economic aspects--United States.
Bromomethane--Environmental aspects--United States.
Bromomethane--Law and legislation--United States.
Ozone layer depletion--Law and legislation--United States.
Ozone-depleting substances--Government policy--United States.