Copeland, B. (1986). Tariffs and quotas: Retaliation and negotiation with two instruments of protection. Department of Economics, University of British Columbia.
Chicago Style aipamenaCopeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Vancouver, Canada: Department of Economics, University of British Columbia, 1986.
MLA aipamenaCopeland, Brian. Tariffs and Quotas: Retaliation and Negotiation with Two Instruments of Protection. Department of Economics, University of British Columbia, 1986.
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