"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGQT-56K : accessed 2 November 2020), Glen Smith in household of W Scott Smith, Spring Creek, Elk, Pennsylvania, United States; citing enumeration district (ED) ED 53, sheet 8A, family 122, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1341; FHL microfilm 1,375,354.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K66H-HXX : 6 March 2020), Glenn Pearl Smith, 1917-1918.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X73J-RH8 : accessed 2 November 2020), Glenn P Smith, Spring, Butler, Kansas, United States; citing enumeration district (ED) ED 43, sheet 4A, line 16, family 76, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 695; FHL microfilm 2,340,430.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRV2-DKS : 18 May 2020), Glenn P Smith, Spring Township, Butler, Kansas, United States; citing enumeration district (ED) 8-43, sheet 6A, line 7, family 116, 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 1222