John Desmond Blackburn
1925 - Abt 1983 (57 years)
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John Desmond Blackburn |
| 1925 - Abt 1983 (57 years) |
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Joseph Henry Blackburn |
| Abt 1898 - Abt 1930 (32 years) |
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Ann Elizabeth Grist |
 1900 - Abt 1946 (45 years) |
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1925 - Abt 1983 (57 years)