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2. HMSO Series Methods for the Examination of Waters and Associated Materials: Determination of the pH Value of Sludge, Soil, Mud and Sediment; and the Lime Requirement of Soil, 2nd edn., 1992; The Determination of the pH in Low Ionic Strength Waters, 1988; Fluoride in Waters, Effluents, Sludges, Plants and Soils, 1982; The Determination of Carbon Dioxide in Natural, Treated and Beverage Waters with a Supplement of Sampling Bottled and Canned Waters, 1986; 5 Day Biochemical Oxygen Demand (BOD5), 2nd edn., 1988.
3. Potentiometric Water Analysis;Midgely,1991
4. Electrochemical Methods in Soil and Water Research;Yu,1993