Vaught, Margaret Allgair2014-03-142014-03-141996etd-09092008-063707http://hdl.handle.net/10919/447141 volume (unpaged)BTDapplication/pdfenIn CopyrightLD5655.V855 1996.V384Thesishttp://scholar.lib.vt.edu/theses/available/etd-09092008-063707/