Friedrich Ris
Friedrich Ris (1867 – 1931 in Glarus) was a Swiss physician and entomologist who specialised in Odonata. He was Director of a psychiatric clinic in Rheinau, Switzerland.
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Friedrich Ris (1867 – 1931 in Glarus) was a Swiss physician and entomologist who specialised in Odonata. He was Director of a psychiatric clinic in Rheinau, Switzerland.
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