Columbia subject headings:
Export sales contracts--Taxation--Law and legislation--United States.
Export sales contracts--United States.
Income tax--United States--Foreign income.
Tax incentives--Law and legislation--United States.
Harvard subject headings:
Export sales contracts--United States.
Income tax--United States--Foreign income.
Tax incentives--Law and legislation--United States.
Princeton subject headings:
Export sales contracts--United States.
Income tax--United States--Foreign income.
Tax incentives--Law and legislation--United States.