"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMK9-B1Z : accessed 31 December 2020), Peter N Muller, Montana town, Buffalo, Wisconsin, United States; citing enumeration district (ED) 13, sheet 7A, family 107, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,779.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MP28-ZZH : accessed 31 December 2020), Peter N Muller, Montana, Buffalo, Wisconsin, United States; citing enumeration district (ED) ED 15, sheet 4B, family 72, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1702; FHL microfilm 1,375,715.
"United States Census, 1920," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFVF-325 : accessed 31 December 2020), Peter Mueller, Buffalo, Wisconsin, United States; citing ED 46, sheet 2A, line 45, family 28, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1975; FHL microfilm 1,821,975.
“In a Large Circle of Relatives; A Geanological Guide to the Early Community of Rollingstone, Minnesota” by Mary E. Nilles, 1989 ISBN 0-9616845-1-8, Printed by W & C Printing Co., Winona, Minnesota, Page 226 and 228