Columbia subject headings:
Corporations--Taxation--United States.
Excess profits tax--United States.
Income tax--Law and legislation--United States.
Taxation--Law and legislation--United States.
Taxation--Law and legislation.
Harvard subject headings:
Corporations--Taxation--United States.
Excess profits tax--United States.
Income tax--Law and legislation--United States.
Taxation--Law and legislation
Taxation--Law and legislation--United States
Princeton subject headings:
Corporations--Taxation--United States.
Excess profits tax--United States.
Income tax--Law and legislation--United States.
Taxation--Law and legislation--United States.
Taxation--Law and legislation.