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      <marc:subfield code="a">Crowe, Allan, </marc:subfield>
      <marc:subfield code="d">1952- </marc:subfield>
      <marc:subfield code="e">author.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="0">
      <marc:subfield code="a">EXPRES : </marc:subfield>
      <marc:subfield code="b">an expert system for assessing the fate of pesticides in the subsurface / </marc:subfield>
      <marc:subfield code="c">by A.S. Crowe and J.P. Mutch.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="246" ind1="1" ind2="0">
      <marc:subfield code="a">Expert system for assessing the fate of pesticides in the subsurface</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="264" ind1=" " ind2="1">
      <marc:subfield code="a">Burlington, Ontario, Canada : </marc:subfield>
      <marc:subfield code="b">Canada Centre for Inland Waters, National Water Research Institute, </marc:subfield>
      <marc:subfield code="c">May 1990.</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="a">computer</marc:subfield>
      <marc:subfield code="b">c</marc:subfield>
      <marc:subfield code="2">rdamedia</marc:subfield>
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      <marc:subfield code="a">online resource</marc:subfield>
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      <marc:subfield code="a">NWRI contribution ; </marc:subfield>
      <marc:subfield code="v">90-75</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">"RRB 90-41."</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">Digitized edition from print [produced by Environment and Climate Change Canada].</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">"This manuscript has been prepared for submission to: Journal of Environmental Monitoring and Assessment."</marc:subfield>
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    <marc:datafield tag="504" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes bibliographical references (pages 18-21).</marc:subfield>
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    <marc:datafield tag="520" ind1="3" ind2=" ">
      <marc:subfield code="a">"This paper describes an expert system, known as EXPRES (EXpert system for Pesticide Regulatory Evaluation Simulations), which is designed to aid regulatory personnel in their assessment of the potential for pesticides to contaminate the soil and groundwater environment. EXPRES consists of two existing numerical models (PRZM and LEACHM) which are used to simulate the transport and transformation of pesticides in the unsaturated zone, coupled with a knowledge-based system that guides the user through the selection of all the necessary information to construct input data sets for these models"--Abstract.</marc:subfield>
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    <marc:datafield tag="546" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes abstract and management perspective in English and French.</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Groundwater</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Pesticides</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Computer systems</marc:subfield>
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      <marc:subfield code="a">Mutch, James Percy, </marc:subfield>
      <marc:subfield code="d">1949- </marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Environment Canada.</marc:subfield>
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      <marc:subfield code="a">Canada Centre for Inland Waters.</marc:subfield>
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      <marc:subfield code="a">National Water Research Institute (Canada)</marc:subfield>
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      <marc:subfield code="a">NWRI contribution ;</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-75-eng.pdf</marc:subfield>
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