Douglas Exchange, Northwestern Bell Telephone Company, Duluth, Minnesota
Northwestern Bell Telephone Company, original Douglas Exchange, 1202 101st Avenue West, clapboard ~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Douglas Exchange, Northwestern Bell Telephone Company, Duluth, Minnesota
Northwestern Bell Telephone Company, original Douglas Exchange, brick, neighborhood ~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections