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KETsiolkovskys rocket & rocket speed formula

  • Colnect-2051-010-KETsiolkovsky--s-rocket-and-rocket-speed-formula.jpg
Short desc: KETsiolkovskys rocket & rocket speed formula




This design is used by one stamp:
Poland 11/11/1963 30g gray dt=space (1963 Poland) perf=9-14.5






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