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Air vs.oxygen: two activated sludge systems compared/ michael A.Miller
Miller,michael A unknown 1978 p.
Landmark Texas decision agrees benefit is not worth the cost / Thomas E.Taylor
Taylor,Thomas E unknown 1978 p.
Los Angeles faces several sludge management problems/ Bill Davis; Roger T. Haug
Davis, Bill unknown 1978 p.
Take pick and shovel work out of computation/ Thomas H.Hablett
Hablett, Thomas H unknown 1978 p.
Water supply system ready in a flash/ Robert K.Clifford; G.Reynolds Watkins
Clifford, Robert K unknown 1978 p.