"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4Z5-6XQ : accessed 30 April 2019), Magaret R Horn in household of William A Horn, Mosier, Wasco, Oregon, United States; citing ED 216, sheet 2A, line 12, family 22, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1504; FHL microfilm 1,821,504.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XCS6-B7T : accessed 30 April 2019), Margaret R Horn in household of William Horn, Mosier, Wasco, Oregon, United States; citing enumeration district (ED) ED 19, sheet 2B, line 56, family 83, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1957; FHL microfilm 2,341,691.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRT6-51P : 14 March 2018), Margaret R Horn in household of William A Horn, Mosier Election Precinct, Wasco, Oregon, United States; citing enumeration district (ED) 33-15, sheet 3A, line 4, family 48, 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 3381.
"Oregon Deaths, 1842-1952 and Delayed Births, 1844-1914," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:F8W7-C7Y : 11 March 2018), Margaret Ruth Horn, 19 Jul 1946; citing Death, Linn, Oregon, United States, 19 Jul 1946, state and county archives, Oregon; FHL microfilm 2,110,203.
"Oregon Death Index, 1903-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VZWS-2RD : 11 December 2014), Margaret R Horn, 19 Jul 1946; from "Oregon, Death Index, 1898-2008," database and images, Ancestry (http://www.ancestry.com : 2000); citing Linn, Oregon, certificate number 4957, Oregon State Archives and Records Center, Salem.
"Oregon Death Index, 1903-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VZ4M-RLL : 11 December 2014), Margare Horn in entry for William A Horn, 27 Mar 1962; from "Oregon, Death Index, 1898-2008," database and images, Ancestry (http://www.ancestry.com : 2000); citing Linn, Oregon, certificate number 3340, Oregon State Archives and Records Center, Salem.
"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VP3V-YJQ : 26 November 2014), Frey in entry for Irene J Higley, 20 May 1997; Department of Public Health Services, Sacramento.