"Glass Melting". Battelle PNNL MST Handbook. U.S. Department of Energy, Pacific Northwest Laboratory. Archived from the original on 2010-05-05. Retrieved 2008-01-26.
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"Glass Melting". Battelle PNNL MST Handbook. U.S. Department of Energy, Pacific Northwest Laboratory. Archived from the original on 2010-05-05. Retrieved 2008-01-26.