Illinois State Archives & United States. Census Office. 7th census, 1850. (1850). [Seventh census of the United States, 1850.
Lua i Stíl Chicago (17ú heag.)Illinois State Archives agus 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
Lua MLA (8ú heag.)Illinois State Archives agus 1850 United States. Census Office. 7th census. [Seventh Census of the United States, 1850. 1850.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.