TY  - BOOK
AU  - Marshall,A.J.
AU  - Williams,W.D.
TI  - Textbook of zoology : Invertebrates
SN  -  0-333-13678-0
U1  - 592 
PY  - 1974///
CY  - London 
PB  - English language and book 
KW  - Zoology
KW  - Invertebrates
N1  - includes index
ER  -