(Q67676)

English

Gregor von Helmersen

Baltic German geologist

  • Grigory Petrovich Helmersen
  • Georg von Helmersen

Statements

Helmersen-1876.jpg
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29 September 1803Gregorian
11 October 1803Gregorian
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3 February 1885Gregorian
15 February 1885Gregorian
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Gregor Helmersen
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Gregor Helmersen
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Identifiers

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