<?xml version="1.0" encoding="UTF-8"?><collection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.loc.gov/MARC21/slim" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd"><record><leader>01383nam a2200325 a 4500</leader><controlfield tag="001">002725735</controlfield><controlfield tag="003">MiAaHDL</controlfield><controlfield tag="005">20250726000000.0</controlfield><controlfield tag="006">m        d        </controlfield><controlfield tag="007">cr bn ---auaua</controlfield><controlfield tag="008">931130s1989    mdu      b   f000 0 eng d</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(MiU)990027257350106381</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">sdr-miu.990027257350106381</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="z">(MiU)MIU01000000000000002725735-goog</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)20550762</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="z">(MiU)Aleph002725735</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">TIM</subfield><subfield code="c">TIM</subfield><subfield code="d">EYM</subfield><subfield code="d">UtOrBLW</subfield></datafield><datafield tag="245" ind1="0" ind2="2"><subfield code="a">A Guide to understanding discretionary access control in trusted systems.</subfield></datafield><datafield tag="260" ind1=" " ind2=" "><subfield code="a">[Fort George G. 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