TY  - BOOK
AU  - De Beer,Gavin
TI  - Embryos and ancestors / 
PY  - 1951///
CY  - Oxford : 
PB  - Clarendon, 
KW  - Embryology
KW  - Evolution
N1  -  An expanded form of the author's Embryology and evolution, 1930;  Includes bibliographical references (p. 143-154)
ER  -