En
Ru
| Description |
Tsiolkovsky.Life and technical ideas.- 1937. -p. 11, 12 are absent in the original..Source of electronic copy: State Library of Ugra
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| Description |
Tsiolkovsky.Life and technical ideas.- 1937. -p. 11, 12 are absent in the original..Source of electronic copy: State Library of Ugra
|
|---|