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By "Ingram, Capt Collingwood "
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XVII.– Notes on the Height at ivhich Birds migrate
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By: Ingram, Capt Collingwood
Type: Article
In: Ibis
Volume: 1
Series: 11
Issue: 2
Date: 1919
Page Range: 321--325
Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
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