"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XST6-399 : accessed 16 November 2018), Mary H Messer in household of Harry G Messer, Chicago (Districts 0251-0500), Cook, Illinois, United States; citing enumeration district (ED) ED 284, sheet 13B, line 61, family 581, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 425; FHL microfilm 2,340,160.
"Illinois, Cook County, Birth Certificates, 1871-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2S8-721W : 18 May 2016), Mary Elizabeth Haskell in entry for John Wood Messer, 25 May 1930; Chicago, Cook, Illinois, United States, reference/certificate 23409, Cook County Clerk, Cook County Courthouse, Chicago; FHL microfilm .
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KMBG-CB9 : 16 March 2018), Mary H Messer in household of Harry G Messer, Ward 3, Davenport, Davenport City Township, Scott, Iowa, United States; citing enumeration district (ED) 82-35, sheet 61A, line 17, family 118, 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 1202.
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