TY  - BOOK
AU  - Clarkson, E.N.K. .
TI  - Invertebrate Paleontology and Evolution
SN  - 0-04-560013-9
U1  - 560 
PY  - 1986///
CY  - London
PB  - Allen & Unwin
KW  - Geology
KW  - Palaeontology-Invertebrate
KW  - Invertebrate paleontology-Evolution
KW  - Fossils
KW  - Historical geology
KW  - PG-Geology
N1  - Index
ER  -