Source Information
Ancestry.com. Chicago, the great industrial and commercial center of the Mississippi Valley [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.Original data: Plumbe, George E.. Chicago, the great industrial and commercial center of the Mississippi Valley : an area with an annual tonnage of twenty-two billion tons. Chicago, Ill.: Civic-Industrial Committee of the Chicago Association of Commerce, 1912.