Duration of the fourth internship of Nicolaas Joseph DelaiveDuration of the third internship of Hartog Erwteman1911-05-16/1912-09-111911-05-16/1914-08-181911-05-16/1912-07-261911-05-16/..1911-05-16/1913-06-171911-05-16/1913-04-181911-05-16/..1911-05-16/..1911-05-16/..Duration of the membership of ANDB by Eugine Daelen
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1911-05-16
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1911-05-16