Johan Oskar Backlund

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Johan Oskar Backlund
Onye na-enyocha mbara igwe nke mba Swedish-Russian

Ọrụ

[edit]
  • "Encke's Comet 1895–1908" in Ọkwa kwa ọnwa nke ọgbakọ Royal Astronomical , mbiputa nke iri asaa, ibe akwụkwọ nke nari anọ ná iri abụo na iteghete wee ruo na narị anọ na iri anọ na abụọ n'afọ (1910)
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