Preliminary keys, age & sex of duck wings
By: by Samuel Carney & Aelred Geis.
Contributors: Geis, Aelred D., 1929-
Publisher: s.n.
Published: 1963
Place of publication: [Washington, D.C.?
Language: eng
Number of pages: 55
Subjects: Ducks; Wings (Anatomy); Feathers
Other titles: Age & sex of duck wings; Age and sex of duck wings
Notes: Cover title.

Reproduced from typewritten copy.