Expand your research by checking out the Michigan Online Historical Newspapers here.
Branch County and Business Directory, Stevens & Conover/Courier, 1870-1 - Free (University of Michigan)
Union City Directory, Robinson, 1909 - Free (Don's List)
Union City Directory, Robinson, 1909 - Free (Don's List)
Branch County Rural Directory, Wilmer Atkinson, 1919 - Free (Internet Archive)
Coldwater City Directory, unknown, 1949-50 - Free (DistantCousin - available through the Wayback Machine - may "disappear" with time)