[Syrphidae] Sotavolta 1947

[ximo mengual sanchis]

Dear all,

Do any of you have a copy of the following article?

Sotavolta, O. (1947) The flight-tone (wing stroke frequency) of insects.
Suomen Hyönteistieteellinen Seura - Acta Entomologica Fennica, 4, 1-117.

Thanks!

Ximo
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