TY  - BOOK
AU  - Downing  John A Et al (eds.)
TI  - A Manual on Methods For the Assessment of Secondary Productivity in Fresh Waters
U1  - 574.52632 
PY  - 1984///
CY  - LONDON
PB  - BLACKWELL SCIENTIFIC PUBLICATI
KW  - A Manual on Methods For the Assessment of Secondary Productivity in Fresh Waters
ER  -