"Michigan Births, 1867-1902," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQNV-83J : 4 December 2014), Ada V. Calkins, 29 Mar 1872; citing item 2 p 54 rn 3532, Hopkins, Allegan, Michigan, Department of Vital Records, Lansing; FHL microfilm 2,297,930.
"Michigan Births and Christenings, 1775-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4TR-MP2 : 9 December 2014), Ada Viola Calkins, 29 Mar 1872; citing ALLEGAN,MICHIGAN, reference ; FHL microfilm 1,017,867.
"Michigan Marriages, 1868-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N3XY-DTZ : 4 December 2014), James S. Iliff and Ada V. Calkins, 26 Apr 1899; citing Allegan, Allegan, Michigan, item 1 p 8 rn 3927, Department of Vital Records, Lansing; FHL microfilm 2,342,511.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M91D-BTD : accessed 11 August 2017), Ada V Iliff in household of James Iliff, Monterey township, Allegan, Michigan, United States; citing enumeration district (ED) 20, sheet 7A, family 116, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,698.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLP4-2DN : accessed 11 August 2017), Ada V Iliff, West Hopkins, Allegan, Michigan, United States; citing enumeration district (ED) ED 16, sheet 11A, family 256, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 634; FHL microfilm 1,374,647.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZSS-V98 : accessed 11 August 2017), Ada V Illiff, Hopkins, Allegan, Michigan, United States; citing ED 19, sheet 4B, line 72, family 80, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 753; FHL microfilm 1,820,753.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XQTK-MTR : accessed 11 August 2017), Ada V Iliff, Hopkins, Allegan, Michigan, United States; citing enumeration district (ED) ED 17, sheet 1B, line 78, family 26, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 972; FHL microfilm 2,340,707.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K42S-P7G : accessed 11 August 2017), Ada V Iliff, Hopkins, Hopkins Township, Allegan, Michigan, United States; citing enumeration district (ED) 3-17, sheet 1A, line 12, family 4, 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 1721.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JKZG-3P5 : 20 May 2014), Ada Iliff, Apr 1975; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).