1st Internship of Frans van Eunen1st Internship of Antoni Marinus Elling2nd Internship of Hendrik van Donselaar2nd Internship of Daniel Herfst1st Internship of Jan Klinkenberg2nd Internship of Louis Andries Holst1st Internship of Theodorus van Immerzeel1st Internship of Leonardus Karel Lugten1st Internship of Franciscus Johannes van Marle1st Internship of Johannes Margarethus Moesenbroek1st Internship of Gerardus Johannes Moesenbroek2nd Internship of Johannes M. Bakels1st Internship of Catharina M. Moesenbroek4th Internship of Joseph J.G. v.d. Moolen1st Internship of Hendrik H. Reddering1st Internship of Christiaan H. Scholten1st Internship of Jan Gerrit van Santen2nd Internship of Louis Hendrik Zegwaard1st Internship of Hendrik de Vries1st Internship of Hendrik de Vries1st Internship of Adrianus Christiaan Visser1st Internship of Hendrikus Johannes in den Berken