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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Mark D. Kurz.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Trull, Thomas W. (Thomas William)</dim:field>
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   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">1989</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, 1989.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (leaves 194-199).</dim:field>
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   <dim:field mdschema="dc" element="title" lang="en_US">Diffusion of helium isotopes in silicate glasses and minerals : implications for petrogenesis and geochronology</dim:field>
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   	&lt;Title>Diffusion of helium isotopes in silicate glasses and minerals : implications for petrogenesis and geochronology&lt;/Title>
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