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2. Pesticide Usage in Scotland;SOAEFD,1995
3. Organophosphorus Pesticides in River and Drinking Water. Tentative Method. Methods for the Examination of Waters and Associated Materials;HMSO,1980
4. Scottish Farm Waste Liaison Group for the Scottish Office Agriculture and Fisheries Department. Prevention of Environmental Poluttion from Agricultural Activity;SOAFD;Code of Good Practice,1992
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