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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Henry Wallman.</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mathematics, 1947.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Bibliography: leaves 154-173.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Beatrice Helen Worsley.</dim:field>
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