Columbia subject headings:
Income tax deductions for charitable contributions--United States.
Income tax--United States--Deductions--Charitable contributions.
Tax exemption--Law and legislation--United States.
Harvard subject headings:
Income tax deductions for charitable contributions--United States
Tax exemption--Law and legislation--United States.
Princeton subject headings:
Income tax deductions for charitable contributions--United States.
Tax exemption--Law and legislation--United States.