feather-tract
A Dictionary of Aviation · 1911 · p. 10
‘fedez,trekt n.» [also spelt fetherztract] one of the definit tracts or areas of the skin of a bird where fethers grow; pteryla.
Bu kavram başka kaynaklarda da geçiyor
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Music Lover's Encyclopedia (1939)
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Adair's New Encyclopedia (1923)
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Stedman's Medical Dictionary: A Practical Medical Dictionary (1920)
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French-English Dictionary of Military Terms (1918)
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Hawkins' Electrical Dictionary (1915)
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The American Illustrated Medical Dictionary (1913)
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The American Illustrated Medical Dictionary (1913)
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Everybody's Encyelopedia (1912)
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The American Dictionary and Cyclopedia (1910)
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Chamber's Twientieth Century Dictionary (1908)
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Chamber's Twientieth Century Dictionary (1908)
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A Dictionary of Men's Wear (1908)
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An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
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An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
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The Student's Medical Dictionary (1896)
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