TY  - GEN
AU  - Rathnasiri,   B.
AU  - Kottagama, S.W.  
AU  - Peris, H.T.R
TI  - Zoology  ( Tamil ): environmental studies
U1  - 591.5 
PY  - 1985///
CY  - Nugegoda
PB  - Open University
KW  - ZOOLOGY
ER  -