Vos , P., J. de Koning, and R. van Eerden. “Landscape History of the Oer-IJ Tidal System, Noord-Holland (the Netherlands)”. Netherlands Journal of Geosciences 94 (January 4, 2016): 295 - 332. Accessed May 20, 2026. https://njgjournal.nl/index.php/njg/article/view/12071.