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?? ???? ?????????? ??????? ?????????? ??????? ??? ??? ? ????? ????? (?? ??????? : MF ? Medium Frequency ) ?? ????? ??? ??? ???????? ?? ???? ???????? ???? ??????. [?] [?] [?]

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  1. ↑ "Rec. ITU-R V.431-7, Nomenclature of the frequency and wavelength bands used in telecommunications" (PDF) . ITU. Archived from the original (PDF) on 31 October 2013 . Retrieved 20 February 2013 .
  2. ↑ Seybold, John S. (2005). Introduction to RF Propagation . John Wiley and Sons. pp. 55?58. ISBN   0-471-74368-2 .
  3. ↑ "Ground wave MF and HF propagation" (PDF) . Introduction to HF Propagation . IPS Radio and Space Services, Sydney Australia . Retrieved 27 September 2010 .
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