"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHC3-LX8 : accessed 15 February 2015), Johan Van Sytzama in household of Janie K Mitchell, East Washington, Washington, Pennsylvania, United States; citing enumeration district (ED) 0063, sheet 4B, family 114, line 91, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2162; FHL microfilm 2,341,896.