Ornithology

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FRIDERICH, (C.G.).

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BROWN, LESLIE.

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NIETHAMMER, GÜNTHER (Hrsg.).

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SCHØYEN, CARL

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FAIRBAIRN, WILLIAM ALEXANDER.

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(SCHUBERT, G.H. VON.).

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COLLETT, R.

Kristiania, Aschehoug & Co., 1921.