Columbia subject headings:
Harvard subject headings:
Checkoff--United States.
Labor unions--Finance--Law and legislation--United States.
Payroll deductions--Law and legislation--United States.
Union dues--United States.
Princeton subject headings:
Checkoff--United States.
Labor unions--Finance--Law and legislation--United States.
Payroll deductions--Law and legislation--United States.
Union dues--United States.