Keywords: Jan van Blerkom.jpg en Jan van Blerkom Late 1930s Late 1930s official picture found in Delftsche Studenten Raad Gedenkboek van het verzet der Delftsche studenten en docenten gedurende de jaren 1940-1945 1947 p 57 author other versions Anonymous-EU Uploaded with UploadWizard Resistance fighters from the Netherlands Delft University of Technology students |