"New York, Passenger Arrival Lists (Ellis Island), 1892-1924," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/J61V-Y3D : accessed 01 Nov 2014), Frister Brugsma, arrived at New York, 14 Jun 1893, on the Spaarndam; citing National Archives, Washington D.C.
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MSMB-J57 : accessed 01 Nov 2014), Frister Brugma in household of Harm Venema, Precinct 3 Grand Rapids city Ward 11, Kent, Michigan, United States; citing sheet 12B, family 276, NARA microfilm publication T623, FHL microfilm 1240723.