Columbia subject headings:
Corporations--Taxation--Law and legislation--United States.
Corporations--Taxation--United States.
Income tax--Law and legislation--United States.
Income tax--United States.
Old age pensions--Taxation--Law and legislation--United States.
Old age pensions--United States.
Harvard subject headings:
Corporations--Taxation--United States.
Income tax--United States.
Old age pensions--United States.
Princeton subject headings: