TY  - BOOK
AU  - Colbert, Edwin H.
TI  - Evolution of the vertebrate: history of the backboned animals through time 
SN  - 085226125X
AV  - QL605.5 .C6
PY  - 1969///
CY  - New Delhi
PB  - Wiley Eastern Limited
KW  - Vertebrates
KW  - Zoology
N1  - includes bibliographical references and index
ER  -