TY  - BOOK
AU  - Colbert,Edwein H..
TI  - Evolution of the vertebrates:history of the backboned animals through time / 
SN  - 085226125x
U1  - 596 
PY  - 1969///
CY  - Sri Lanka : 
PB  - Wiley Eastern , 
KW  - VERTEBRATE
N1  - NULL
ER  -