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NPS Form 10-900-a (Rev. 8-86) Wisconsin Word Processing Format (Approved 3/87) United States Department of the Interior National Park Service National Register of Historic Places Continuation Sheet Schooner-barge Pretoria Section __9 Page 23 Ashland County, WI Laurent, Jerome K. 1983 Trade, Transport, and Technology: The American Great Lakes, 1866-1910. Journal of Transport History, third series 4(1):1-24. Lewis, Bertram B. 1948 Pretoria's Bell Found. Inland Seas 4(3):207, Great Lakes Historical Society, Vermillion, Ohio. Mansfield, J.B. 1972 History of the Great Lakes. Two Volumes. Reprint of 1899 edition. Freshwater Press, Cleveland. McCarty, John Myron 1971 Economic Aspects in the Evolution of the Great Lakes Freighter. Ph.D. dissertation. Department of Economics, University of Southern California. Michigan Census 1894 State of Michigan Census, 1893-94. Schedule 4-- Manufactories, Mines, Fisheries--Products of Industry Bay County, Bay City, page 66A. State Archives Reel no. 4936 . Michigan Department of Labor. 1898 Fifteenth Annual Report of the Bureau of Labor and Industrial Statistics. Robert Smith Printing, Lansing. Mills, James Cook 1910 Our Inland Seas: Their Shipping & Commerce For Three Centuries. A.C. McClurg, Chicago. Morris, Paul C. 1973 American Sailing Coasters of the North Atlantic. Bolch and Osborn, Chardon.