1912-05-14/1919-08-01Duration of the second internship of Petrus Johannes Wilhelmus HoornDuration of the third internship of Karel P. v.d. Hoek1912-05-14/1913-06-261912-05-14/1913-09-261912-05-14/1917-03-17Duration of the internship of Jan BaaijDuration of the second internship of Jan BaaijDuration of the second internship of Adrianus Smit1912-05-14/1914-03-281912-05-14/..
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1912-05-14
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1912-05-14