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      <marc:subfield code="a">Booty, William G., </marc:subfield>
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      <marc:subfield code="a">Freshwater ecosystem water quality modelling / </marc:subfield>
      <marc:subfield code="c">by W. C. Booty and D.C.L. Lam.</marc:subfield>
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      <marc:subfield code="a">"This paper presents a review of recent (1978-1988) water quality models which have been developed for predicting the impacts; pathways, fate and effects of nutrient and toxicchemicals in freshwater systems"--Abstract.</marc:subfield>
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