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   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Charles E. Lock, C. R. Hayward.</dim:field>
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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mining Engineering and Metallurgy, 1921.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (leaves 125-126).</dim:field>
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   	&lt;Title>Concentration of the lead ores of the Corona Lead and Silver Mining Company; Corona, New Mexico&lt;/Title>
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