00763naa#a2200217#i#450# EN\INFRA-M\bibl\19712 20241212002530.4 2500-0535 20171229b2017####ek#y0engy0150####ca ENG RU Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity Journal article Moscow INFRA-M Academic Publishing LLC. 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 zh-szf.ru