"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MS95-K78 : accessed 07 Apr 2014), John Vander Ploeg, Holland city Ward 1, Ottawa, Michigan, United States; citing sheet 5A, family 90, NARA microfilm publication T623, FHL microfilm 1240738.