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- [S1] Ancestry.com, 1920 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2010;), Year: 1920; Census Place: Ben Avon, Allegheny, Pennsylvania; Roll: T625_1509; Page: 10B; Enumeration District: 17.
- [S8] Ancestry.com, 1910 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Lehi, UT, USA; Date: 2006;), Year: 1910; Census Place: Pittsburgh Ward 25, Allegheny, Pennsylvania; Roll: T624_1308; Page: 10B; Enumeration District: 0628; FHL microfilm: 1375321.
- [S313] Ancestry.com, U.S., Social Security Death Index, 1935-2014, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2014;), Social Security Administration; Washington D.C., USA; Social Security Death Index, Master File.
Name: Violet Lobkowitz;
Social Security Number: 191-22-2772;
Birth Date: 11 Jul 1904;
Issue Year: Before 1951;
Issue State: Pennsylvania;
Last Residence: 19380, West Chester, Chester, Pennsylvania, USA;
Death Date: Jan 1985
- [S460] Ancestry.com, 1930 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2002;), Year: 1930; Census Place: Bellevue, Allegheny, Pennsylvania; Page: 2B; Enumeration District: 0502; FHL microfilm: 2341694.
- [S9] Ancestry.com, 1900 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2004;), Year: 1900; Census Place: Cumberland Ward 2, Allegany, Maryland; Page: 6; Enumeration District: 0126; FHL microfilm: 1240604.
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