Elektromagnetiske spektrum: Forskelle mellem versioner

* [http://www.altair.org/ Exploring the electromagnetic spectrums] {{Webarchive|url=https://web.archive.org/web/20031125025757/http://www.altair.org/ |date=25. november 2003 }}

* [http://www.ntia.doc.gov/osmhome/allochrt.html U.S. Frequency Allocation Chart] {{Webarchive|url=https://web.archive.org/web/20080204194331/http://www.ntia.doc.gov/osmhome/allochrt.html |date= 4. februar 2008 }} – Covering the range 3kHz-300GHz (from United States Department of Commerce|Department of Commerce)

* [httphttps://web.archive.org/web/20040206101353/http://strategis.ic.gc.ca/epic/internet/insmt-gst.nsf/vwapj/spectallocation.pdf/$FILE/spectallocation.pdf Canadian Table of Frequency Allocations]

* [http://www.ofcom.org.uk/static/archive/ra/topics/spectrum-strat/future/strat02/strategy02app_b.pdf UK frequency allocation table] {{Webarchive|url=https://web.archive.org/web/20121114191258/http://www.ofcom.org.uk/static/archive/ra/topics/spectrum-strat/future/strat02/strategy02app_b.pdf |date=14. november 2012 }} (from Ofcom, which inherited the Radiocommunications Agency's duties, pdf format)