References:

Ancestry.com
Birth records: Wisconsin
Census Records: US9
Death Records: Social Security Death Index
Public Trees
Antigo High School Graduate Lists
Birth certificates: Marian Kreie
Death Certificates: William Kreie, Elida Kreie, Edward Kreie
Letter from Margaret Kreie (William's third and last wife)
Manitowoc City Directors
Newspaper records, including articles, obituaries
Newton, Wisconsin, history of (Website)
Personal collection of memorabilia
Personal recollection of relatives, friends
Petition for Adoption: Manford Kiefert
Registration cards of William Kreie, WW I and II
Theda Clark School of Nursing records
Wikipedia: History /population of Antigo and Manitowoc, Wisconsin, History of Chicago & North Western Railway, duties of a fireman and engineer on a steam locomotive, histories of various societies.

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