TY  - BOOK
AU  - Williams,W.D.
AU  - Marshall,Alan John
TI  - Textbook of zoology: Vol. I invertebrates 
SN  - 0333178688
U1  - 591 
PY  - 1985///
CY  - London
PB  - Macmillan
KW  - Zoology
N1  - includes index.

ER  -