Duration of the second internship of Carel Marinus Erbé1913-05-06/..Duration of the third internship of Martinus LangDuration of the third internship of Izak BeugeltasDuration of the second internship of Jacob VeldmanDuration of the second internship of Trijntje de VriesDuration of the membership of ANDB by Jacob HaakDuration of the membership of ANDB by Jacob Haak
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1913-05-06
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1913-05-06