| Sources |
- [S117] CIVIL RECORD. TRIAL - Johannes Jacobus KOCH vs Aletta Margaretha ADENDORFF, (VAB/HG/VOL:4/2/2/81/REF:252/1956).
- [S327] CIVIL RECORD. TRIAL - Johannes Jacobus KOCH vs Aletta Margaretha ADENDORFF, (VAB/HG/VOL:4/2/2/1/99/REF:4/1957).
- [S328] CIVIL RECORD. TRIAL - Johannes Jacobus KOCH vs Aletta Margaretha ADENDORFF, (VAB/HG/VOL:4/2/2/1/99/REF:55/1957).
- [S394] DEATH NOTICE - Johannes Jacobus KOCH (d.1968), (NAB/MSCE/REF:4480/1968).
- [S733] CLAIMS FOR COMPENSATION - Johannes Jacobus KOCH 1903, (TAB/CJC/VOL:1189/REF:766).
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