Credits / sources

• Radiodetermination and Special Service Stations, ITU 1986
• Civil Aviation Authority/London
• Posisjoner borefartøy, produksjonsanlegg (Radiofrekvenskontoret, Teledirektoratet)
• Air Navigation plan, European Region(ICAO)
• British Airways(AERAD), Europe&Middle East Supplement 1987
• British Airways/Jeppesen/SAS/Luftfartsverket Norway Flight Maps
• Luftfartsverket Norway
• Luftfartsvärket Sweden
• Admirality List of Radio Signals, ALRS 2 1977, 1987, 1994
• Shortwave News
• MV-EKO/Sweden
• Olle Alm, Harnösand, Sweden
• Distance UKVK
• DX-Monitor IRCA/USA
• DX-News Norway
• DX-News NRC/USA
• The Lowdown, LWCA/USA
• Medium Wave News/UK
• Steve Whitt, Buxhall, UK
• Alan Gale, Oldham, UK
• Medium Wave Horizons Norway 1970-1993
• Jaroslav Lajda, CZE
• Geir Stokkeland, Vestnes, Norway
• Joachim Stiller, Sickte, Germany
• Handbuch der Funknavigationshilfen(Radio Beacon Handbook) Dr.Jürgen
• Trochimczyk, 2nd Edition, Wilhelm Herbst Verlag