AU  - Gopal,Brij  .
TI  - Elements of Ecology / 
SN  - 0-7069-1560-7
U1  - 574.5 
PY  - 1979///
CY  - N.Delhi-110002
PB  - Vikas Publishing House Pvt. Ltd. , 
KW  - Botany
N1  - NULL
ER  -