渥太華協議

渥太華會議係1932年7月21號到8月20號喺加拿大渥太華召開嘅會。協議通過關稅優惠同免徵關稅來減低貿易障礙，英聯邦國家包括英國同佢嘅殖民地，都可以享有同等待遇，當時嘅香港都受惠。

攷 
 British Empire Economic Conference (Time magazine)
 Barry Eichengreena and Douglas A. Irwin, Trade blocs, currency blocs and the reorientation of world trade in the 1930s, Journal of International Economics , Volume 38, Issues 1-2, February 1995, Pages 1-24 
 Robert A. MacKay, Imperial Economics at Ottawa, Pacific Affairs, Vol. 5, No. 10 (Oct., 1932), pp. 873-885
 Maxwell Slutz Stewart, The Ottawa conference, Foreign policy association, incorporated, 1932

加拿大史