St. Lawrence seaway project : hearings before a subcommittee of the Committee on Foreign Relations, United States Senate, Eightieth Congress, first session, on S. J. Res. 111, a joint resolution approving the agreement between the United States and Canada relating to the Great Lakes-St. Lawrence Basin, with the exception of certain provisions thereof ; expressing the sense of the Congress with respect to the negotiation of certain treaties ; providing for making the St. Lawrence seaway self-liquidating ; and for other purposes. May 28, 29, June 11, 12, 13 and 20, 1947.