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   <dim:field mdschema="dc" element="description" lang="en_US">Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1973. Ph.D.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">MICROFICHE COPY ALSO AVAILABLE IN BARKER ENGINEERING LIBRARY.</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 338-341.</dim:field>
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