TY  - BOOK
AU  - Hanson, Earl D.
TI  - Animal diversity [3rd ed.]
T2  - / edited by Carl P. Swanson
U1  - 591.38 
PY  - 1972///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Zoology -- Variation
KW  - Evolution
KW  - Phylogeny
N1  - Sel. Read. : P. 154-156
ER  -