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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 25 Ashland County, WI Thompson, Mark L. 1991 Steamboats & Sailors of the Great Lakes. Wayne State University Press, Detroit. U.S. Census Office 1890 U.S. Census, Report on Manufacturing Industries in the United States: 1890. Part III, Selected Industries. U.S. Department of the Interior, Census Office. Government Printing Office, Washington, D.C. U.S. Light House Service 1905 Outer Island Light Station Journal. Copy of original on microfilm, Apostle Islands National Lakeshore, Bayfield, Wisconsin. U.S. National Park Service 1986 Guidelines for Completing National Register of Historic Places Forms: Part A. National Register of Historic Places Bulletin 16, U.S. Department of the Interior, Washington, D.C. 1991 Nominating Historic Vessels and Shipwrecks to the National Register of Historic Places. National Register of Historic Places Bulletin 20, U.S. Department of the Interior, Washington, D.C. Van der Linden, Peter J. 1979 Great Lakes Ships We Remember. Freshwater Press, Cleveland. 1984 Great Lakes Ships We Remember II. Freshwater Press, Cleveland. Williamson, Samuel. H. 1977 The Growth of the Great Lakes as a Major Transportation Resource, 1870-1911. In Research in Economic History: An Annual Compilation of Research. Volume 2. Ai Jai Press, Greenwich.