2nd Internship of Frits Geesthuijsen1st Internship of Nico Kanes2nd Internship of Salomon Appelboom1st Internship of Wilhelmina de Leeuwe1st Internship of Jacob Lakmaker1st Internship of Philip Sigaar1st Internship of Soesman Sigaar1st Internship of Meijer van Velzen1st Internship of Maurits Jacques Viool1st Internship of Willem Vos