Barber, Clarence (December 1955). "Canadian Tariff Policy". Canadian Journal of Economics and Political Science. 21 (4): 513–530. doi:10.2307/138128. JSTOR138128.
jstor.org
Barber, Clarence (December 1955). "Canadian Tariff Policy". Canadian Journal of Economics and Political Science. 21 (4): 513–530. doi:10.2307/138128. JSTOR138128.