1912-02-28/1917-01-13Duration of the third internship of Johan Fr. uit den Bogaard1912-02-28/1916-12-16Duration of the second internship of Willem Johannes Kelbling1912-02-28/1916-09-301912-02-28/1919-06-041912-02-28/..1912-02-28/1916-08-121912-02-28/1918-06-121912-02-28/..Duration of the second internship of Abraham Waterman
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1912-02-28
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1912-02-28