15 Aug 2000; 14 p; 8. International Conference on the Structure of Non-Crystalline Solids; Aberystwyth (United Kingdom); 6-11 Aug 2000; W-31109-ENG-38; Also available from OSTI as DE00761267; PURL: https://www.osti.gov/servlets/purl/761267-VLXsTI/webviewable/