Historical Sample of the Netherlands - Staff The staf of the Historical Sample of the Netherlands (HSN) are listed on this page. Manager HSN Kees Mandemakers Data Coordinator Marja Koster Early Stage Researcher, LONGPOP Project Francisco Anguita Data Entry Jan Bartman Martin Berrier Student-assistent Rob Boemen Student-assistent Tamara Breugelmans Behice Gül Early Stage Researcher Diogo Paiva Student-assistent Inge van Ruiten Student-assistent Inge Slagter Student-assistent Mickey van der Stap Rolf Wasser Volunteer (HSN) Walfried Commandeu Volunteer (HSN) Theo Dibbets Volunteer (HSN) Jos van Hees Volunteer (HSN) Ben Mouwes Volunteer (HSN) Frits Nijstad Volunteer (HSN) Bert Schijf Volunteer (HSN) Inez de Vries