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  1. 1
    Water quality in a stressed environment : readings in environmental hydrology.
    by Pettyjohn, Wayne A
    Published 1972
    Subjects: '; “...Water Pollution United States...”
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  2. 2
    Protection of public water supplies from ground-water contamination / edited by Wayne A. Pettyjohn.
    Published 1987
    Subjects: '; “...Water, Underground Pollution United States Congresses...”
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