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| | WILLIAM T. PLASS AWARD 1990 Mr. Benjamin C. Greene, West Virginia Mining & Reclamation AssocDr. William C. Ashby, Southern Illinois University 1992 Dr. William E. Sopper, Pennsylvania State University 1993 Dr. FraAdd to Reading ListSource URL: www.asmr.usDownload Document from Source Website File Size: 109,19 KBShare Document on Facebook
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