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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Harold L. Alexander.</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (p. 143-148).</dim:field>
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   	&lt;Title>Acoustic noise suppression for helicopter communication systems&lt;/Title>
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