Fred P Ritsema Head M 28 Canada
Marian Ritsema Wife F 25 Michigan
Kenneth Ritsema Son M 4 Michigan
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KH34-Y3R : accessed 19 February 2018), Fred P Ritsema, Ward 3, Grand Rapids, Grand Rapids City, Kent, Michigan, United States; citing enumeration district (ED) 86-167, sheet 4A, line 26, family 74, 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 1902.