Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten", KNAW, 2006. "KNAW > Publicaties > Detailpagina". Archived from the original on 2007-02-20. Retrieved 2009-12-03.
Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten", KNAW, 2006. "KNAW > Publicaties > Detailpagina". Archived from the original on 2007-02-20. Retrieved 2009-12-03.