TY  - BOOK
AU  - Ricker, W.E.
TI  - IBP HandBook No.3:Methods for assessment of fish production in fresh waters / 
SN  - 0 632 08490 1
U1  - K92 
PY  - 1979///
CY  - London : 
PB  - International Biological Programme , 
KW  - Zoology
ER  -