Columbia subject headings:
Income tax--Law and legislation--United States.
Internal revenue law--United States.
Research and development contracts, Government--United States.
Harvard subject headings:
Foreign tax credit--United States.
Income tax deductions for expenses--United States
Income tax--United States--Foreign income.
Research--United States--Costs.
Princeton subject headings:
Foreign tax credit--United States.
Income tax deductions for expenses--United States.
Income tax--United States--Foreign income.
Research--United States--Costs.