1. Joint maps of the international boundary between United States and Canada : from the source of the St. Croix River to the Atlantic Ocean Yale Public content 1934. 2012-02-07T17:49:59Z. 2015-10-21T15:21:13Z. International Boundary Commission. U.S. Geological Survey, engraved by William-Webb Co.). English. Public. Northern boundary of the United States, United States, and Canada.