TY  - BOOK
AU  - Chaloner,W.G.
AU  - Hallam, A.
TI  - Evolution and extinction
AV  - QTO QE721.E97.E8 
PY  - 1989///
CY  - London
PB  - Cambridge University Press
KW  - Exaction (Biology)
KW  -  Evaluation Paleontology
KW  -  Congress
ER  -