Informazioni sulla fonte
Ancestry.com. Bibliography of the printed maps of Michigan, 1804-1880 [database online]. Provo, UT: Ancestry.com Operations Inc, 2005.Dati originali: Karpinski, Louis Charles,. Bibliography of the printed maps of Michigan, 1804-1880 : with a series of over one hundred reproductions of maps, constituting an historical atlas of the Great Lakes and Michigan. Lansing, Mich.: Michigan Historical Commission, 1931.