De Beer, Gavin Rylands, 1899-
Embryos and ancestors.
- Oxford : Clarendon Press, 1940.
- x, 108 p. : illus., plates, diagrs.
The author's Embryology and evolution (1930)
brought up to date and enlarged.
Bibliography : p. 99-105.
Embryology.
Evolution.
QH371 / D4 1940