11930 U.S. Federal Cencus, Wisconsin, 30 Sep 2004, Ancestry.com.
2Social Security Death Index. "Name: Robert J. Koberstein
SSN: 387-16-9765
Born: 24 Jun 1925
Died: 19 Apr 1991
State (Year) SSN issued: Wisconsin (Before 1951 )."3California Death Records, vitalsearch-worldwide.com. "Name: KOBERSTEIN, ROBERT JAMES
Social Security #: 387169765
Sex: MALE
Birth Date: 24 Jun 1925
Birthplace: Wisconsin
Death Date: 19 Apr 1991
Death Place: Monterey
Mother's Maiden Name: Bremner."
1Milwaukee County Wisconsin Marriage Registration, pp.1951 - 1954, Milwaukee County Recorders Office. "Robert K. married Phyllis E. Jagger on 18 Apr 1954 at Chicago, Cook, Illinois. Grooms father and mother were Geroge L. Koberstein and Theresa Brewer. Brides father and mother were Lloyd Jagger and Marguerite Timme."
1California Births, 1905-1995, Ancestry.com. "KOBERSTEIN ANNA M 1956 06 26 JAGGER FEMALE ALAMEDA 0."
2California Births, 1905-1995. "Name: Anna M Koberstein
Birth Date: 26 Jun 1956
Gender: Female
Mother's Maiden Name: Jagger
Birth County: Alameda."
1California Groom Koberstein Marriage Index 1960-1985, vitalsearch-worldwide.com. "Groom Age Bride Age Date Mo/Dy/Yr County of Marriage
Koberstein, Robert J. 56 Hansen, Sandy P. 35 11/7/1981 San Luis Obispo."
67. Constance Virginia PETERSON
1Minnesota Births - 1935-2002, Ancestry.com. "Name: Constance Virginia Peterson
Birth Date: 18 Aug 1944
Birth County: Ramsey
Father: Homer A. Peterson
Mother: Harriett E. Koberstein
File Number: 1944-MN-018191."
1Minnesota Births - 1935-2002, Ancestry.com. "Name: Janet Louise Peterson
Birth Date: 27 May 1949
Birth County: Ramsey
Father: Homer A. Peterson
Mother: Harriett E. Koberstein
File Number: 1949-MN-056944."
1Minnesota Births - 1935-2002, Ancestry.com. "Name: Bruce Alan Peterson
Birth Date: 17 Apr 1952
Birth County: Ramsey
Father: Homer Alton Peterson
Mother: Harriett Elizabeth Koberstein
File Number: 1952-MN-009318."
1The News Tribune Tacoma, WA, Internet, www.genealogy.com @, http://genforum.genealogy.com/cgi-bin/pag. "The News Tribune Tacoma, WA dated September 09, 1994 page B4, births; Vital statistics KOBERSTEIN: David and Terri, Fox Island, boy, Sept. 2."