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2. Standard Methods for the Examination of Water and Wastewater,1989
3. River pollution from a large trout farm in Norway;Bergheim;Aquaculture,1978
4. Chemical budgets for channel catfish ponds;Boyd;Transactions of the American Fisheries Society,1985
5. A nutrient budget of some intensive marine shrimp ponds in Thailand;Briggs;Aquaculture and Fisheries Management,1994