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   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Tang, Jian, 1968-</dim:field>
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   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">1999</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (leaves 152-157).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Jian Tang.</dim:field>
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   <dim:field mdschema="dc" element="title" lang="en_US">Helicity density matrix formalism and polarized processes in QCD</dim:field>
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   	&lt;Title>Helicity density matrix formalism and polarized processes in QCD&lt;/Title>
   	&lt;Subtitle>Helicity density matrix formalism and polarized processes in quantum chromodynamics&lt;/Subtitle>
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