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   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">1987</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1987.</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Title as it appeared in Massachusetts Institute of Technology Graduate List, February, 1987 : Secondary instability in Ekman flow.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Bibliography: leaves [120]-[121].</dim:field>
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