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)
KW  - Evolution
N1  - Part 1.Concepts and Methodology--
Part 2.Phylogeny of the Protozoa and Early Metazoa--
Part 3.Perspective
ER  -