Silverman, Richard L.2014-03-142014-03-141996-06-06etd-11142013-040018http://hdl.handle.net/10919/4568826 leavesBTDapplication/pdfenIn CopyrightLD5655.V851 1996.S568Master's projecthttp://scholar.lib.vt.edu/theses/available/etd-11142013-040018/