Ronald L. Baker, From Needmore to Prosperity: Hoosier Place Names in Folklore and History, Indiana University Press, (ISBN978-0-253-32866-3, lire en ligne), p. 47 :
« ...so it was in the news when the post office was named Alaska. »
news.google.com
« Towns named after states », Reading Eagle, , p. 3 (lire en ligne, consulté le ).
postalhistory.com
« Morgan County », Jim Forte Postal History (consulté le ).