In publishing this letter by Ya. L. Al'pert, the editors conclude the discussion of his article ``The Outer Ionosphere and Its Transition to the Interplanetary Medium'', deeming a continuation of this discussion inadvisable.

PACS: 94.20.ws, 94.20.wc, 84.40.Xb (all)
DOI: 10.1070/PU1968v011n02ABEH003827
URL: https://ufn.ru/en/articles/1968/2/o/
Citation: Al’pert Ya L "Letter to the Editor" Sov. Phys. Usp. 11 283–283 (1968)

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Оригинал: Альперт Я Л «Письмо в редакцию „Успехов физических наук“» УФН 94 581–581 (1968); DOI: 10.3367/UFNr.0094.196803k.0581