St. Lawrence Seaway : tariff of tolls : agreements between the United States of America and Canada, amending the agreement of March 9, 1959, as amended, and supplemented, effected by exchange of notes, signed at Washington March 30 and August 1, 1989.
Washington, D.C. : Dept. of State : For sale by the Supt. of Docs., U.S. G.P.O., [1994?]