Holst, Helge

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1902

Holst, Helge: "Arternes Oprindelse I-IV", Vor Jord, no. 25, 27, 31 and 32.

1909

Ukendt (Holst, Helge): "Charles Darwin", Frem (Vor Jord), 12th ed., no. 22, 28 February, pp. 89-91 and cover photo  

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