1st Internship of Johan Willem Bouquet1st Internship of Jacobus Joh. le Fèvre1st Internship of Hendrik le Fèvre2nd Internship of Johan Willem le Duc1st Internship of Antonius Lamb. Helmig1st Internship of Willem Herfst1st Internship of Wilhelmus Johannes Helmig1st Internship of Johan George Helmig1st Internship of Teunis van Gelder1st Internship of Hendrik v.d. Horst2nd Internship of Arnoldus v.d. Horn1st Internship of Hermanus Christianus van der Horst1st Internship of Doris van Raamsdonk1st Internship of Willem Frederik Philips1st Internship of Jan Schutz3th Internship of Jan Schutz1st Internship of Hendrik B.L. Schildkamp1st Internship of Franciscus Teunissen2nd Internship of Hendrik van der Valk1st Internship of Johannes van der Valk1st Internship of Johannes G. Wessendorp1st Internship of Pieter Wyga1st Internship of Petrus Wessendorp1st Internship of Theodorus Johannes George Wessendorp1st Internship of Gerardus Johannus van Zijl