TY  - BOOK
AU  - Downing,John A.
AU  - Rigler,Frank H.
TI  - A manual on methods for the assessment of secondary productivity in fresh waters
SN  - 0632006161
PY  - 1984///
CY  - Oxford
PB  - Blackwell Scientific Publications
KW  - Freshwater productivity
KW  - Measurement
ER  -