TY  - BOOK
AU  - Clarkson,E.N.K.
TI  - Invertebrate palaeontology and evolution
SN  - 0045600082 (pbk.)
AV  - QE770 .C6 1979 .C6 1979
U1  - 562 
PY  - 1979///
CY  - London, Boston
PB  - G. Allen & Unwin
KW  - Invertebrates, Fossil
ER  -