Pilot rules for Great Lakes and their connecting and tributary waters, adopted by Board of U.S. Supervising Inspectors on Feb. 14, 1907, and approved by Secretary of Commerce and Labor on Feb. 25, 1907; edition of July 1, 1907 [electronic resource].
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.