Dr

Dr. M. M. Ellis, in charge of Interior Fisheries Investigations, making careful physiological measurements, has helped show why waters polluted with industrial or municipal wastes kill fish, and have established minimum concentrations which are lethal to aquatic life.

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Author: NOAA Central Library Historical Fisheries Collection/ NOAA

License: Public Domain Mark 1.0 (Public domain)

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Added On	17th October 2015
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