TY  - GEN
AU  - Gopal, Brij
TI  - Elements of ecology
SN  - 0-7069-1560-7 :
U1  - 574.5 
PY  - 1979///
CY  - Kolkata
PB  - Vikas publishing
KW  - ECOLOGY
N1  - Includes bibliography and index
ER  -