Columbia subject headings:
Income tax--Law and legislation--United States.
Inheritance and transfer tax--United States.
Internal revenue law--United States.
Law reports, digests, etc.--United States.
Harvard subject headings:
Income tax--Law and legislation--United States.
Inheritance and transfer tax--United States.
Internal revenue law--United States.
Law reports, digests, etc.--United States.
Princeton subject headings: