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      <marc:subfield code="e">rda</marc:subfield>
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      <marc:subfield code="a">En40-1072/1990E-PDF</marc:subfield>
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      <marc:subfield code="a">Machell, J. R., </marc:subfield>
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      <marc:subfield code="a">Atlantic shellfish area classification inventory 1990 / </marc:subfield>
      <marc:subfield code="c">by J.R. Machell and A.S. Menon.</marc:subfield>
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      <marc:subfield code="a">[Dartmouth, Nova Scotia] : </marc:subfield>
      <marc:subfield code="b">Environment Canada, Conservation and Protection, Atlantic Region, </marc:subfield>
      <marc:subfield code="c">July 1990.</marc:subfield>
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      <marc:subfield code="a">Digitized edition from print [produced by Environment and Climate Change Canada].</marc:subfield>
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      <marc:subfield code="a">"The present inventory is intended to provide a summary of the classification status of growing area waters in the Atlantic Provinces for 1990. It will as well provide a review of the total area under surveillance by the program and a measure of trends in the classification from year to year"--page 1.</marc:subfield>
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      <marc:subfield code="a">Shellfish</marc:subfield>
      <marc:subfield code="z">Atlantic Coast (Maritime Provinces)</marc:subfield>
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      <marc:subfield code="a">Crustacés</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
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      <marc:subfield code="b">Atlantic Region, </marc:subfield>
      <marc:subfield code="e">issuing body.</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_2025/eccc/en40/En40-1072-1990-eng.pdf</marc:subfield>
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