United States Department of the Interior Geological SurveyState of Minnesota, Department of ConservationSegar, Raymond W., 1914-2000O'Leary Lake quadrangle topographic map (N4730-W9307.5/7.5) featuring handwritten notations by Ray Segar in pencil and red ink regarding logging railroad lines and camps in the area north of Nashwauk. The hand written notations include information on the following logging camps noted with 'C'.JPEGengUnited States Department of the Interior Geological SurveyPublicCommunicationO'Leary Lake Quadrangle, Minnesota-Itasca County, 1964: 7.5 Minute Series (Topographic) MapMapsMinnesota--NashwaukMinnesota1964University of Minnesota