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      <marc:subfield code="a">Design of uranium mines and mills </marc:subfield>
      <marc:subfield code="h">[electronic resource] : </marc:subfield>
      <marc:subfield code="b">ventilation systems.</marc:subfield>
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      <marc:subfield code="i">At head of title: </marc:subfield>
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      <marc:subfield code="a">Version 1.0.</marc:subfield>
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      <marc:subfield code="c">2018.</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Conception des mines et des usines de concentration d’uranium : systèmes de ventilation.</marc:subfield>
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      <marc:subfield code="a">"March 2018."</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (p. 16).</marc:subfield>
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      <marc:subfield code="a">"This regulatory document is part of the CNSC’s Physical design series of regulatory documents, which also covers design for reactor facilities, laboratories and medical facilities. REGDOC-2.5.4, Design of Uranium Mines and Mills: Ventilation Systems, is a guide to help persons meet the requirements for submitting ventilation-related information when applying for a CNSC licence to prepare a site for and construct, operate or decommission a uranium mine or mill. This document supersedes regulatory document G-221, A Guide to Ventilation Requirements for Uranium Mines and Mills, published in June 2003"--Preface, p. i.</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2018/ccsn-cnsc/CC172-191-2018-eng.pdf</marc:subfield>
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