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<http://webisa.webdatacommons.org/424481637>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<copperclub.org> .
<http://webisa.webdatacommons.org/prov/137830336>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/424481637> .
<http://webisa.webdatacommons.org/424481637>	<http://www.w3.org/ns/prov#value>	"He has lectured on mineral economics at such schools as Massachusetts Institute of Technology, Pennsylvania State University and the Colorado School of Mines and has published articles on mineral markets." .
<http://webisa.webdatacommons.org/prov/256234014>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/424481637> .