TY  - GEN
AU  - Downing, John A
AU  - Rigler, Frank H
TI  - A Manual on Methods for the Assessment of Secondary Productivity in Fresh Waters
T2  - IBP Hand Book 17
U1  - 577.6315 
PY  - 1984///
CY  - Oxford
PB  - Blackwell Scientific Publications
KW  - Biological Productivity
KW  - Aquatic Ecology
KW  - Freshwater Ecology
ER  -