"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XMGN-4V5 : accessed 25 August 2021), Helen Arniorg in household of Mamie Arniorg, Fort Smith, Sebastian, Arkansas, United States; citing enumeration district (ED) ED 39, sheet 1A, line 20, family 6, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 95; FHL microfilm 2,339,830.
"New Mexico Deaths, 1889-1945," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FLYT-5G3 : 10 March 2018), Helen Reita Arning, 28 Oct 1930; citing Logan, Quay, New Mexico, reference 3965, Bureau of Vital Records and Health Statistics, Santa Fe; FHL microfilm 1,913,287.
Monumental inscription. United States of America. Fairmont Cemetery, Raton, Colfax, New Mexico. 1930. (b. 1916) ARNING, Helen. GPS: 36.903611, -104.430511. Photographed by: Azure Robinson: taken 22 Feb 2020.
Find a Grave, database and images (https://www.findagrave.com/ : accessed 25 August 2021), memorial page for Helen Arning (1916–1930), Find A Grave: Memorial #22954154, citing Fairmont Cemetery, Raton, Colfax County, New Mexico, USA ; Maintained by Nancy Robertson (contributor 46945954).