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Beier , E. W. Final Report DOE Grant DE-FG02-03ER41230-A000, report, June 9, 2004; (https://digital.library.unt.edu/ark:/67531/metadc779413/m1/1/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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