Duration of the second internship of Robert OnderwijzerDuration of the third internship of Abraham Roos1937-10-18/..Duration of the residency at Leidsestraat 106/108 Amsterdam by Emiel van der VlietDuration of the membership of ANDB by Theodorus Johannes Franciscus de WitDuration of the membership of ANDB by Josephus Hummeling
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1937-10-18
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1937-10-18