TY  - BOOK
AU  - Khanna,D R.
AU  - Singh,S  .
TI  - Pond fish ecology and economics / 
SN  - 8170352819
U1  - 597.17636 
PY  - 2002///
CY  - Delhi : 
PB  - Daya Publishing House , 
KW  - POND ECOLOGY
N1  - Includes bibliography and index
ER  -