TY  - GEN
AU  - Marshall & Williams, xx
AU  - Parker, T.J.
AU  - Haswell, W.A.
TI  - Text Book of Zoology : Invertebrates Vol.-I
U1  - 592 
PY  - 1972///
CY  - London
PB  - English Language Book Society
KW  - ZOO.--INVERTEBRATE
ER  -