"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KMY9-JZ3 : 14 March 2018), Helen B Rooney in household of William Rooney, Ward 4, Charles City, Charles City Township, Floyd, Iowa, United States; citing enumeration district (ED) 34-5, sheet 62A, line 9, family 532, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1161.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J57V-9YD : 20 May 2014), Helen Rooney, 06 Sep 2002; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"Arizona, Payson, Obituaries, 1948-2008," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2W7-G5Z3 : accessed 30 October 2018), Helen B Shaules Rooney, 2002; citing Payson, Gila, Arizona, United States, The Arizona Republic newspaper, Pheonix; Payson Roundup newspapers and Northern Gila County Genealogy Society Library, Payson; FHL microfilm 101,023,160.