Welch, Edwin J.Kalliokoski, J.Michigan Technological UniversityMichiganGeological Survey DivisionExtent: 1 map Notes: From: Kalliokoski, J. Magnitude and quality of Michigan's coal reserves. Lansing, Mich. : Geological Survey Division, 1977.Cartographic material.TIFF/JPEGoai:d.lib.msu.edu:maps_1164https://n2t.net/ark:/85335/m59c6vs7tengMichigan Technological UniversityPublicCoalCoal deposits, Shiawassee County, Mich., 1976MapsMichigan--Shiawassee CountyMichigan1976Michigan State University