TY  - BOOK
AU  - KOTPAL, R . L .
TI  - ECHINODERMATA / 
T2  - ZOOLOGY PHYLUM , 8
U1  - 593.9 
PY  - 1973///
CY  - MEERUT
PB  - RASTOGI AND CO .
KW  - ECHINODERMATA
ER  -