1st Internship of Gerrit J. Bosje1st Internship of Maarten van den Blom1st Internship of Simon Godvliet1st Internship of Cornelis Jan Roeland Kroon1st Internship of Gerardus J. Overhof1st Internship of Elie de Raaij1st Internship of Mozes Schuitevoerder1st Internship of Hendrik Cornelis de Ruijter1st Internship of Gerardus E. de Ruiter1st Internship of Frederik Visser1st Internship of Johannes Hendrik Wagner1st Internship of Hartog Bosboom1st Internship of Joseph Woudhuijzen1st Internship of Samson Cohen