Vort slægtsregister
Familie: Carl Johan Helm-Petersen / Kathrine Ladefoged (F54280)
g. 19 jan. 1941Knud Valdemar Helm-Petersen (1878-1951) 
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Harriet Lüders Jørgensen (1880-1967)
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| Astrid Helm-Petersen (1907- ) |
Knud Valdemar Helm-Petersen (1908- )  |
| Poul Frederik Helm-Petersen (1910- ) |
| Leif Mogens Helm-Petersen (1911- ) |
| Carl Johan Helm-Petersen (1911-1962)
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| Kathrine Ladefoged (1919- ) |