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| - oodwin Ltd, London.The formulation auxiliaries required, such as inert materials, surfactants, solvents and other additives, are likewise known and are described, for example, in: Watkins, Handbook of Insecticide Dust Diluents and Carriers", 2nd Ed., DarlandBooks, Caldwell, N.J.; H. v. Olphen, Introduction to Clay Colloid Chemistry, 2nd Ed., J. Wiley & Sons, New York; Marschen, Solvents Guide
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