The flight of birds Headley, F. W. (Frederick Webb), 1856-1919 creator text book London Witherby & co 1912 1912
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ENG 59.82:11.74 Birds Flight physiology QL693 .H5X https://www.biodiversitylibrary.org/bibliography/14486 1357073 17018192 10.5962/bhl.title.14486