TY  - BOOK
AU  - Clarkson,E.N.K.
TI  - Invertebrate palaeontology and evolution / 
SN  - 0045600074 : 
U1  - 562 CLA 
PY  - 1979///
CY  - London : 
PB  - G. Allen & Unwin, 
KW  - Invertebrates, Fossil
N1  -  Includes bibliographies and indexes
ER  -