TY  - BOOK
AU  - Hanson,Earl D.
TI  - The origin and early evolution of animals
SN  - 0819550086 :
U1  - 591.38 
PY  - 1977///
CY  - Middletown, Conn.
PB  - Wesleyan University Press
KW  - Evolution (Biology)
N1  - Includes bibliographical references and index
ER  -