Regionaal Archief Nijmegen (Regional Archive Nijmegen) has quite a collection on the 4Days Marches. To make the collection available for everyone, Regionaal Archief Nijmegen has created a digital encyclopedia at Huis van de Nijmeegse Geschiedenis. This website with information about the history of Nijmegen also offers the possibility to anyone of adding their own articles or personal stories. You can help to create this digital encyclopedia on the greatest more days walking achievement event of the world.
For film footage of the 4Days Marches we would like to refer you to the website of the Nederlands Instituut voor Beeld en Geluid (the Netherlands Institute for Sound and Vision). This is a cultural-historical organization that collects and maintains audiovisual data that is of certain importance for the Dutch historic and cultural heritage, making it accessible for as many users as possible.
Foundation Novio Magus also has a page with interesting information about the history of the 4Days Marches in Nijmegen.
Visit our YouTube channel for more (historical) 4Days Marches-videos!