Викитека". ru.wikisource.org (in Russian). Retrieved 2024-04-09. Гельмерсен Григорий Петрович // Большая советская энциклопедия: [в 30 т.] / под ред. А. М...
13 KB (1,466 words) - 17:19, 21 June 2024
Gregor von Helmersen or Grigory Petrovich Helmersen (Russian: Григорий Петрович Гельмерсен, 11 October [O.S. 29 September] 1803 – 15 February [O.S. 3 February] 1885)...
6 KB (478 words) - 03:36, 6 July 2024