TY  - BOOK
AU  - COLBERT, EDWIN H.
TI  - EVOLUTION OF THE VERTEBRATES:A HISTORY OF BACKBONE (ANIMALS THROUGH TIMES)
U1  - 596 COL 
PY  - 1989///
CY  - NEW DELHI
PB  - WILLEY EASTERN LTD.
KW  - Chordates
ER  -