Relief shown by hachures and spot heights. "Julius Bien, lith. N.Y." From Rominger, Carl Ludwig. Upper Peninsula, 1878-1880, accompanied by a geological map. New York: Julius Bien, 1881. 1 map: hand col.; 46 x 76 cm This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.