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3. Determination of Optimum Velocity Gradients for Waters Coagulated with Polyelectrolytes;Hemenway;Wtr. Sew. Works,1968
4. Field Use of a Cationic Polymer for Clarification;Kleber;Wtr. Wastes Engrg.,1969
5. Velocity Gradient Paths in Coagulation;TeKippe;Jour. AWWA,1971