Columbia subject headings:
Income tax--Ontario.
Tax incidence--Ontario.
Tax incidence.
Harvard subject headings:
Progressive taxation--Canada.
Progressive taxation--Ontario.
Progressive taxation.
Tax incidence--Canada.
Tax incidence--Ontario.
Tax incidence.
Princeton subject headings:
Progressive taxation--Canada.
Progressive taxation--Ontario.
Progressive taxation.
Tax incidence--Canada.
Tax incidence--Ontario.
Tax incidence.