TY  - BOOK
AU  - Chatwal, M.S.
TI  - A textbook of invertebrates
SN  - 8187815310
U1  - 592 
PY  - 2000///
CY  - New Delhi: 
PB  - Campus Books International, 
KW  - Echinoderms
KW  - Pogonophorans
KW  - Protozoa
KW  - Zoology
ER  -