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XII.— Some preliminary remarks on the Velocity of Migratory Flight among Birds, with special reference to the Palœarctic Region

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By: Meinektzhagen, Colonel R

Type: Article

In: Ibis

Volume: 3

Series: 11

Issue: 2

Date: 1921

Page Range: 228--238

Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,