00727naa#a2200205#i#450# EN\INFRA-M\bibl\19708 20241121210035.4 2500-0535 20171229b2017####ek#y0engy0150####ca ENG RU North-south asymmetry of ultra-low-frequency oscillations of Earth’s electromagnetic field Journal article Moscow INFRA-M Academic Publishing LLC. 2017 5 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Guglielmi Anatol Vladimirovich Klain Boris Icikovich Potapov Alexander Sergeevich zh-szf.ru