TY  - BOOK
AU  - Bhargava, Gopal  .
TI  - Environmental challenges and ecological disaster / 
SN  - 81-7099-395-4
U1  - G:55.1 
PY  - 1992///
CY  - New Delhi : 
PB  - Mittal Publications , 
KW  - Biology- Ecological disaster
ER  -