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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">George W. Clark.</dim:field>
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   <dim:field mdschema="dc" element="contributor" qualifier="department" lang="en_US">Massachusetts Institute of Technology. Department of Physics</dim:field>
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   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">1968</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1968. Ph.D.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Vita.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Bibliography: leaves 34-35.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">Ph.D.</dim:field>
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   <dim:field mdschema="dc" element="title" lang="en_US">An investigation of cosmic gamma rays.</dim:field>
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