00712naa#a2200205#i#450# EN\INFRA-M\bibl\20508 20241127080538.3 2500-0535 20180331b2018####ek#y0engy0150####ca ENG RU Electron density at F1-layer heights in the last solar minimum (2007–2009) Journal article Moscow INFRA-M Academic Publishing LLC. 2018 2 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Kushnarenko Galina Petrovna Yakovleva Olga Evgenyevna Kuznetsova Galina Mihaylovna zh-szf.ru