TY  - BOOK
AU  - Manivaskam, N 
TI  - à¤¹à¤µà¤¾ à¤à¤° à¤ªà¤¾à¤¨à¥ à¤®à¥à¤ à¤à¤¹à¤°!
SN  - 81-237-2346-6
PY  - 1998///
CY  - India: 
PB  - National Book Trust, 
KW  - Environmental science
ER  -