United States Department of the Interior Geological SurveyState of Minnesota, Iron Range Resources and Rehabilitation CommissionSegar, Raymond W., 1914-2000Silica quadrangle topographic map (N4715-W9300/7.5) featuring handwritten notations by Ray Segar in pencil and red ink regarding logging railroad lines and camps in the area between Keewatin and Floodwood. The hand written notations include information on the following: logging camps noted with ΓÇÿC.JPEGengUnited States Department of the Interior Geological SurveyPublicCommunicationSilica Quadrangle, Minnesota, 1952: 7.5 Minute Series (Topographic) MapMapsMinnesota--SilicaMinnesota1952University of Minnesota