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- [S41242] 1930 census, Nebraska, Douglas county, Year: 1930; Census Place: Omaha, Douglas, Nebraska; Page: 14A; Enumeration District: 0058 (Reliability: 3).
- [S48603] 1940 census, Nebraska, Douglas county, Year: 1940; Census Place: Omaha, Douglas, Nebraska; Roll: m-t0627-02269; Page: 9A; Enumeration District: 94-33 (Reliability: 3).
- [S53585] SSDI: Social Security Death Index, Name: Robert T. Casey Social Security Number: 507-18-4937 Birth Date: 24 Sep 1924 Issue year: Before 1951 Issue State: Nebraska Last Residence: 92705, Santa Ana, Orange, California, USA Death Date: 17 Jun 2002 (Reliability: 3).
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