Columbia subject headings:
Harvard subject headings:
Government securities--Taxation--United States.
Income tax--United States.
Intergovernmental tax relations--United States.
Nonprofit organizations--Taxation--United States
Tax exemption--United States
Taxation--United States
Princeton subject headings:
Income tax--Law and legislation--United States.
Local taxation--Law and legislation--United States.
Nonprofit organizations--Taxation--Law and legislation--United States.
Tax exemption--Law and legislation--United States.
Taxation, State--Law and legislation--United States.
Taxation--Law and legislation--United States.