TY  - BOOK
AU  - Heilmann,Gerhard
TI  - The origin of birds
PY  - 1926///
CY  - London
PB  - H. F. and G. Witherty
KW  - Birds, Fossil
KW  - Reptiles, Fossil
KW  - Birds
KW  - Anatomy
N1  - Includes index
ER  -