FamilySearch (https://familysearch.org/ark:/61903/1:1:QK1S-QFHM : 10 March 2018), Ervin Thomsen, 18 Jul 1916; citing Berlin Township, Clinton, Iowa, United States; county district courts, Iowa; FHL microfilm 1,845,587. (Deed) - Ervin Thomsen, "Iowa, County Births, 1880-1935" » Quellen » Généalogie Hoffet » Genealogie Online"> FamilySearch (https://familysearch.org/ark:/61903/1:1:QK1S-QFHM : 10 March 2018), Ervin Thomsen, 18 Jul 1916; citing Berlin Township, Clinton, Iowa, United States; county district courts, Iowa; FHL microfilm 1,845,587. (Deed) - Ervin Thomsen, "Iowa, County Births, 1880-1935" » Quellen » Généalogie Hoffet » Genealogie Online">
"Iowa, County Births, 1880-1935," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK1S-QFHM : 10 March 2018), Ervin Thomsen, 18 Jul 1916; citing Berlin Township, Clinton, Iowa, United States; county district courts, Iowa; FHL microfilm 1,845,587. - Ervin Thomsen, "Iowa, County Births, 1880-1935"
https://familysearch.org/ark:/61903/1:1:QK1S-QFHM