TY  - BOOK
AU  - Marshall A.J
AU  - W.D Williams
TI  - Text book of zoology invertebrates
SN  - 8174730311
U1  - 592 
CY  - Delhi
PB  - AITBS Pub.
KW  - Zoology
KW  - W.D Williams
N1  - Parker & Haswell
ER  -