Duration of the second internship of Gerrit Broekman1911-10-30/1913-05-231911-10-30/1913-09-081911-10-30/1914-05-121911-10-30/1914-02-20Duration of the fourth internship of Benjamin Halberstadt1911-10-30/1914-03-161911-10-30/..1911-10-30/..1911-10-30/1913-04-30Duration of the third internship of Hendricus G. H ScheepensDuration of the fourth internship of Clara Swaab
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1911-10-30
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1911-10-30