"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMNF-839 : accessed 28 February 2021), Lucy M Howard in household of Edward Howard, Shenandoah Iron Works District (east part) Shenandoah town, Page, Virginia, United States; citing enumeration district (ED) 45, sheet 26A, family 467, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,721.
"United States Census, 1920", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MDTV-CWX : 3 February 2021), Lucy M Manley in entry for Edward W Manley, 1920.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4HM-285 : accessed 28 February 2021), Lucy M Manley in household of Edward W Manley, Youngstown, Mahoning, Ohio, United States; citing enumeration district (ED) ED 66, sheet 22B, line 78, family 473, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1846; FHL microfilm 2,341,580.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KWDW-56X : 9 January 2021), Lucy Mae Manley, Youngstown, Mahoning, Ohio, United States; citing enumeration district (ED) 96-86, sheet 6A, line 14, family 105, 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 3270.
Ancestry.com and Ohio Department of Health. Ohio, U.S., Death Records, 1908-1932, 1938-2018 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2010.
https://www.findagrave.com/memorial/204612825/lucy-manley