"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4P8-G8H : accessed 21 Mar 2014), Floyd Stillson, Ward 4, Grand Haven, Grand Haven City, Ottawa, Michigan, United States; citing enumeration district (ED) 70-13, sheet 2B, family 39, NARA digital publication of T627, roll 1808.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X7M7-STC : accessed 21 Mar 2014), Floyd J Stilson in household of Otto Garrow, Grand Haven, Ottawa, Michigan, United States; citing enumeration district (ED) 0013, sheet 2A, family 33, NARA microfilm publication T626, roll 1023.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MZ7M-FV1 : accessed 21 Mar 2014), Floyd Stilson in household of Alexander La France, Onaway, Presque Isle, Michigan, United States; citing sheet 14A, family 273, NARA microfilm publication T625, FHL microfilm 1820791.