"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWVT-YSK : 15 July 2017), William John Martz in household of Johnathan Martz, Larimer, Westmoreland, Pennsylvania, United States; citing enumeration district ED 121, sheet 286A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,255,205.
"Pennsylvania, County Marriages, 1885-1950," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:VF3X-C41 : 5 August 2020), William J Martz and Jennie M Neff, 10 Nov 1898; citing Marriage, Westmoreland, Pennsylvania, United States, multiple County Clerks, Pennsylvania.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M34R-JJ9 : accessed 4 October 2020), William J Martz, Washington borough Ward 1, Washington, Pennsylvania, United States; citing enumeration district (ED) 172, sheet 6A, family 111, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,494.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGC2-WQ8 : accessed 4 October 2020), William J Martz, Southwest Greensburg, Westmoreland, Pennsylvania, United States; citing enumeration district (ED) ED 199, sheet 10A, family 184, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1432; FHL microfilm 1,375,445.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K6K1-YXP : 26 August 2019), William John Martz, 1917-1918.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNMS-Z88 : accessed 4 October 2020), William J Martz, Southwest Greensburg, Westmoreland, Pennsylvania, United States; citing ED 212, sheet 2A, line 31, family 30, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1665; FHL microfilm 1,821,665.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHHY-BX1 : accessed 4 October 2020), William J Martz, Southwest Greensburg, Westmoreland, Pennsylvania, United States; citing enumeration district (ED) ED 162, sheet 4B, line 68, family 94, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2159; FHL microfilm 2,341,893.
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