"Wisconsin, Marriages, 1836-1930," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XR5L-FNN : accessed 16 Jun 2013), Tjeerd S. Obma and Marianna Geises, 16 Mar 1863.http://content.mpl.org/cdm/singleitem/collection/MCMC/id/7885