origin of birds
By: by Gerhard Heilmann, with two plates in colour and one hundred and forty photographs and text figures from drawings by the author.
Publisher: D. Appleton and Company
Published: 1927
Place of publication: New York
Language: eng
Number of pages: 209
Subjects: Birds, Fossil; Reptiles, Fossil; Birds -- Anatomy; Reptiles -- Anatomy; Phylogeny
Notes: "Literature": at end of each part.
Table of contents: title: Some fossil birds.; title: Embryonic stages of reptiles and birds.; title: Some anatomical and biological data.; title: The proavian.