1912-05-04/..Duration of the second internship of Nicolaas KorthalsDuration of the internship of Marcus de Vries1912-05-04/..Duration of the migration of Franciscus Philippus Petrij to IdarDuration of migration Hijman Plukker to AntwerpenDuration of the membership of ANDB by Bernardus F. WestphalDuration of the membership of ANDB by Hermanus HellingmanDuration of the membership of ANDB by Hermanus Hellingman
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1912-05-04
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1912-05-04