"Ernst Teodorovich Krenkel (Russian: Эрнст Теодо́рович Кре́нкель; 24 December [O.S. 11 December] 1903 in Białystok – 8 December 1971 in Moscow) was a Soviet Arctic explorer, radio operator, ...
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doctor of geographical sciences (1938), and Hero of the Soviet Union (1938). Amateur radio callsigns: U3AA, UA3AA, RAEM." - (en.wikipedia.org 31.01.2020)
