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[1]Ziebold, TO and Ogilvie, RE Anal. Chem. 36 (1964) p.322.Google Scholar
[2]
[2]Bence, AE and Albee, A, Geol, J. 76 (1968) p.382.Google Scholar
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[3] The author acknowledges the following for helpful discussions: Tom Ziebold, Dale Newbury, Yet-Ming Chiang, Robert Scott Ogilvie, John Fournelle, and Lanie Gannon.Google Scholar