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Coventry, F. L., V. E. Shelford, and L. F. Miller. 1935. The conditioning of a chloramine 
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England. 
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Ellis, M. M. 1932. Pollution of the Coeur d’Alene River and adjacent waters by the mine wastes. 
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Ellis, M. M. 1934. A photoelectric apparatus for turbidity and light penetration measurement. 
Science, vol. 80, pp. 37-38. New York. 
