↑ Book; TITL Vandermark Family History; AUTH Bovey; PUBL 1942
↑ "New York State Census, 1855," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K679-56B : 13 March 2018), Mary E Van Dermark in household of Marton Van Dermark, E.D. 3, Marbletown, Ulster, New York, United States; citing p. , line #20, family #57, county clerk offices, New York; FHL microfilm 842,646.
↑ "New York State Census, 1865," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVNJ-Q7BL : 10 March 2018), Mary E Duboise in household of James O Duboise, District 01 & 03, Marbletown, Ulster, New York, United States; citing Census, p. 27, citing multiple county Clerks; Warren and Lewis County Board of Supervisors; multiple counties in New York; Utica and East Hampton Public Libraries, New York.
↑ "New York State Census, 1875," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VNKW-ZP8 : 11 March 2018), Alice Dubois in household of James O Dubois, Marbletown, Ulster, New York, United States; citing p. 14, line 37, State Library, Albany; FHL microfilm 842,651.
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZNW-L9X : 20 August 2017), Mary A Dubois in entry for Jacob B Dubois, 1880; citing enumeration district ED 136, sheet 359D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0939; FHL microfilm 1,254,939.
↑ "New York State Census, 1905," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKMN-9RN : 19 July 2018), Mary A Dubois in household of Jacob B Dubois, Marbletown, A.D. 02, E.D. 01, Ulster, New York; citing p. 4, line 2, various county clerk offices, New York; FHL microfilm 842,652.
↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MP1T-SGB : accessed 15 July 2019), Mary A Dubois in household of Jacob B Dubois, Rosendale, Ulster, New York, United States; citing enumeration district (ED) ED 160, sheet 5A, family 97, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1085; FHL microfilm 1,375,098.