deCreative Commons Attribution-Share Alike 3.0 detruetrue Østfold fylkeskommune. www.ostfold-f.kommune.no. Archived from the original on 2003-06-20. Retrieved
DescriptionMap of traditional districts in Østfold County.svg English: Map of traditional districts in Østfold County. Norsk bokmål: Kart over distriktene
DescriptionNorway Viken - Indre Østfold.svg English: Location of Indre Østfold in Viken County in Norway. Date 30 December 2020 Source This vector image