884 resultados para polishing filtration


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Phase I interim report issued Nov. 1976.

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Vita.

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"Supported by Federal Water Pollution Control Administration Research Project WP-00047.

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"Contract No. AT(45-1)-1350."

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Photostatic reproduction.

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Originally issued in 1923, prepared by George F. Catlett, as Special bulletin no. 211 of the North Carolina Board of Health, Bureau of Engineering and Inspection.

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"June 21, 1909."