Ink and pencil on paper.; Relief shown by contours and rock drawings.; Shows trails, campgrounds, springs, railroads, and roads.; "Contour interval = 20 ft."; "Mean sea level datum."37 x 42 centimeters, on sheet 46 x 51 centimetersJPEGUMN_ALMA:9943086240001701engPublicState Park Devils Lake Wisconsin : course in plane table surveyingMapsWisconsin1923University of Minnesota