"Postcodetool for 3241LB". Actueel Hoogtebestand Nederland (به هلندی). Het Waterschapshuis. Archived from the original on 21 September 2013. Retrieved 20 July 2013.
"Collegeleden" [Members of the board] (به هلندی). Gemeente Goerree-Overflakkee. Archived from the original on 5 March 2013. Retrieved 20 July 2013.
web.archive.org
"Collegeleden" [Members of the board] (به هلندی). Gemeente Goerree-Overflakkee. Archived from the original on 5 March 2013. Retrieved 20 July 2013.
"Postcodetool for 3241LB". Actueel Hoogtebestand Nederland (به هلندی). Het Waterschapshuis. Archived from the original on 21 September 2013. Retrieved 20 July 2013.