Bedard, Robert J2012-03-142012-03-1419721972Source: Masters Abstracts International, Volume: 49-04, page: .http://hdl.handle.net/10393/22425http://dx.doi.org/10.20381/ruor-9441Abstract not available.130 p.Economics, Commerce-Business.The effects of the St Lawrence SeaWay on trade patterns and cargo volumes at the Canadian Great Lakes portsThesis