| Popis: |
Although the advance in our knowledge of stream pollution and progress in the application of control measures during the past decade may have appeared erratic at times, yet, considered in its broader aspects, a definite gain has been made in the direction of improvement of procedures, both administrative and technical, for conservation of our water resources. It is to be expected that such advances will be more or less orderly, influenced as they are by changes in the intensity of public interest, governmental support and industrial activity. A review of some of the more important developments in the field of stream sanitation is the purpose of this paper. |
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