"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MLRP-XBJ : accessed 24 May 2013), Bonkje Risselada in entry for Johann Risselada, 1910.
"New York, Passenger Arrival Lists (Ellis Island), 1892-1924," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JF71-VJX : accessed 25 May 2013), Bankje Bauma, 08 Aug 1905; citing Noordam, United States National Archives, Washington, D.C.