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<ead>
  <eadheader countryencoding="iso3166-1" dateencoding="iso8601" langencoding="iso639-2b" repositoryencoding="iso15511" relatedencoding="dc" scriptencoding="iso15924">
    <eadid countrycode="US" url="http://archiveswest.orbiscascade.org/ark:/80444/xv09533" identifier="80444/xv09533" mainagencycode="US-uuml" encodinganalog="identifier">UUM_Accn1214.xml</eadid>
    <filedesc>
      <titlestmt>
        <titleproper encodinganalog="title">Inventory of the Ivor Delwyn Thomas papers<date certainty="approximate" normal="1950/1969" type="inclusive"/></titleproper>
        <titleproper type="filing" altrender="nodisplay">Thomas (Ivor Delwyn) papers</titleproper>
        <author encodinganalog="creator">Finding aid created by Manuscripts Division staff.</author>
      </titlestmt>
      <publicationstmt>
        <publisher encodinganalog="publisher">J. Willard Marriott Library Special Collections</publisher>
        <p>
          <extref href="https://www.lib.utah.edu/img/marriottLibraryLogo.png" show="embed" linktype="simple" actuate="onload"/>
        </p>
        <date encodinganalog="date" calendar="gregorian" era="ce" normal="1991/2020">1991 (last modified: 2020)</date>
        <address>
          <addressline>295 South 1500 East</addressline>
          <addressline>Salt Lake City, Utah 84112</addressline>
          <addressline>Business Number: 801-581-8863</addressline>
          <addressline>special@library.utah.edu</addressline>
          <addressline>https://lib.utah.edu/collections/special-collections/index.php</addressline>
        </address>
      </publicationstmt>
    </filedesc>
    <profiledesc>
      <creation>This finding aid was produced using ArchivesSpace on <date>2026-04-10</date>.</creation>
      <langusage>
        <language langcode="eng" scriptcode="latn" encodinganalog="language">Finding aid written in English.</language>
      </langusage>
      <descrules>Finding aid based on DACS (Describing Archives: A Content Standard), 2nd Edition.</descrules>
    </profiledesc>
  </eadheader>
  <archdesc level="collection" relatedencoding="marc21" type="inventory">
    <did>
      <repository>
        <corpname encodinganalog="852$a">J. Willard Marriott Library Special Collections</corpname>
      </repository>
      <unittitle encodinganalog="245$a">Ivor Delwyn Thomas papers</unittitle>
      <origination>
        <persname source="local" encodinganalog="100">Thomas, Ivor Delwyn, 1925-1976</persname>
      </origination>
      <unitid countrycode="US" repositorycode="US-uuml" encodinganalog="099">ACCN 1214</unitid>
      <physdesc>
        <extent encodinganalog="300$a">4 linear feet</extent>
        <extent encodinganalog="300$a">8 boxes</extent>
      </physdesc>
      <unitdate certainty="approximate" normal="1950/1969" type="inclusive" encodinganalog="245$f">circa 1957-1969</unitdate>
      <abstract encodinganalog="5203_">The Ivor Delwyn Thomas papers consist of materials related to nuclear reactor and nuclear industry development along with personal correspondence and other materials. Thomas was an environmental chemist.</abstract>
      <langmaterial>
        <language langcode="eng" encodinganalog="546">English</language>
      </langmaterial>
    </did>
    <accessrestrict encodinganalog="506">
      <p>Twenty-four hour advanced notice encouraged. Materials must be used on-site. Access to parts of this collection may be restricted under provisions of state or federal law.</p>
    </accessrestrict>
    <userestrict encodinganalog="540">
      <p>The library does not claim to control copyright for all materials in the collection. An individual depicted in a reproduction has privacy rights as outlined in Title 45 CFR, part 46 (Protection of Human Subjects). For further information, please review the J. Willard Marriott Library's <extref linktype="simple" show="new" href="https://lib.utah.edu/collections/special-collections" actuate="onrequest" role="text/html">Use Agreement and Reproduction Request forms</extref>.</p>
    </userestrict>
    <acqinfo encodinganalog="541">
      <p>Gift of Shirley Sutton Thomas.</p>
    </acqinfo>
    <prefercite encodinganalog="524">
      <p>Collection Name, Collection Number, Box Number, Folder Number. Special Collections, J. Willard Marriott Library, The University of Utah.</p>
    </prefercite>
    <processinfo>
      <p>Processed by Manuscripts Division staff in 1991.</p>
      <p><extref linktype="simple" show="new" href="https://lib.utah.edu/services/digital-library/index.php#tab7/" actuate="onrequest" role="text/html">Click here to read a statement on harmful language in library records</extref>.</p>
    </processinfo>
    <scopecontent encodinganalog="5202_">
      <p>The Ivor Delwyn Thomas papers consist of materials related to nuclear reactor and nuclear industry development along with personal correspondence and other materials.</p>
    </scopecontent>
    <separatedmaterial encodinganalog="5440_">
      <p>See also the <extref linktype="simple" show="new" href="https://archivesspace.lib.utah.edu/repositories/3/resources/5681" actuate="onrequest" role="text/html">Ivor Delwyn Thomas photograph collection (P0607)</extref> in the Multimedia Division of Special Collections.</p>
    </separatedmaterial>
    <controlaccess>
      <controlaccess>
        <persname source="local" encodinganalog="600">Thomas, Ivor Delwyn, 1925-1976--Archives</persname>
      </controlaccess>
      <controlaccess>
        <subject source="lcsh" encodinganalog="650">Nuclear industry</subject>
        <subject authfilenumber="sh 85093082 " source="lcsh" encodinganalog="650">Nuclear reactors--Design and construction</subject>
      </controlaccess>
      <controlaccess>
        <subject source="archiveswest" altrender="nodisplay" encodinganalog="690">Nuclear Weapons and Testing</subject>
      </controlaccess>
      <controlaccess>
        <genreform authfilenumber="300048715" source="aat" encodinganalog="655">Articles</genreform>
        <genreform authfilenumber="300027267" source="aat" encodinganalog="655">Reports</genreform>
        <genreform authfilenumber="300026877" source="aat" encodinganalog="655">Correspondence</genreform>
      </controlaccess>
    </controlaccess>
    <dsc type="in-depth">
      <c01 level="file">
        <did>
          <unittitle encodinganalog="245$a">Personal writings, notes and letters</unittitle>
          <container type="box">1</container>
        </did>
      </c01>
      <c01 level="file">
        <did>
          <unittitle encodinganalog="245$a">Nuclear industry materials</unittitle>
          <container type="box">2-5</container>
        </did>
      </c01>
      <c01 level="file">
        <did>
          <unittitle encodinganalog="245$a">Nuclear industry materials with personal</unittitle>
          <container type="box">6-8</container>
        </did>
      </c01>
    </dsc>
  </archdesc>
</ead>

