Thor Andersen, Hans. “R. Tamsma: The Netherlands in Fifty Maps: An Annotated Atlas. (TESG: Tijdschrift Voor Economische En Sociale Geografi. Special issue)”. Geografisk Tidsskrift - Danish Journal of Geography 88 (January 1, 1988). Accessed August 31, 2026. https://tidsskrift.dk/geografisktidsskrift/article/view/44601.