591.38
Gre
E
Gregory , William King 
Evolución emorging  ; a survoy of changing patteerns from primeval life to man . A collaborative work of The American Museum of Natural History and Columbia University ... New York, Macmillan (1951) 
2 t. ilus. , tablas . 26 cm.
Contiene : tomo 1 . Text . Bibliography (p. 561-704). - t. 2 . Ilustracions.