@book{bhlitem34272, title = {The flight of birds }, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/34272}, note = {https://www.biodiversitylibrary.org/bibliography/14486}, publisher = {London, Witherby & co, 1912}, author = {Headley, F. W. (Frederick Webb),}, year = {}, pages = {216}, keywords = {59.82:11.74|Birds|Flight|physiology|}, }