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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Min-Chang Lee, John C. Foster.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Groves, Keith Michael</dim:field>
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   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">1991</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (p. 179-184).</dim:field>
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   	&lt;Title>Nonlinear ionospheric propagation effects on UHF and VLF radio signals&lt;/Title>
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