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Male  Albert Harm Marten Pieter Koolhof
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1902--
1905--
1908--
1911--
1914--
1917--
1920--
1923--
1926--
1929--
1932--
1935--
1937--
Birth--3 February 1907 - Winschoten, Winschoten, Groningen, Netherlands
Marriage--23 May 1932 - Winschoten, Winschoten, Groningen, Netherlands (Age 25)