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• Performing a fuzzy search may retrieve terms with similar spellings: Burow Karen R Nitrate and pesticides in ground water in the eastern San Joaquin Valley California occurrence and trends~.
• If you are trying to use Boolean operators, they must be ALL CAPS: Burow Karen R Nitrate AND pesticides in ground water in the eastern San Joaquin Valley California occurrence AND trends.
• Adding a wildcard symbol may retrieve word variants: Burow Karen R Nitrate and pesticides in ground water in the eastern San Joaquin Valley California occurrence and trends*.