00776naa#a2200217#i#450# EN\\bibl\19712 20260312072713.4 2500-0535 20171229b2017####ek#y0engy0150####ca ENG RU Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2017 6 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Deminov Marat Garunovich Deminova Galina Fedorovna Depuev Viktor Khakimovich Depueva Anna Khakimovna ras.editorum.ru