Beetham, 1912, On the positions assumed by birds in flight
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Original title | On the positions assumed by birds in flight |
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Simple title | On the positions assumed by birds in flight |
Authors | Bentley Beetham |
Date | 1912 |
Countries | GB |
Languages | en |
Keywords | positions assumed by birds in flight |
Journal | Smithsonian Annual Report, British Birds, Aër. Journ |
Related to aircraft? | |
Page count | 30 |
Word count | |
Wikidata id |
Sources
- Brockett (1921), page 133, entry 13: Beetham, Bentley. On the positions assumed by birds in flight. Washington, 1912, Smithsonian Annual Report 1911, pp. 433-439, ill. British Birds, Vol. 4, June 1910-May 1911, Witherby & Co., Lond