00756naa#a2200229#i#450# EN\INFRA-M\bibl\13890 20241203212045.2 2712-9640 20170629b2017####ek#y0engy0150####ca RUS RU Sporadic potassium layers and their connection to sporadic E layers in the mesopause region at Beijing, China Journal article Moscow INFRA-M Academic Publishing LLC. 2017 5 с. Journal article local Геология. Геологические и геофизические науки. 55 RUS Jing Jiao Guotao Yang Jihong Wang Xuewu Cheng Faqun Li zh-szf.ru