Phillips, W. J.2014-03-142014-03-141903etd-09092008-063425http://hdl.handle.net/10919/4471112 leavesBTDapplication/pdfenCreative Commons Public Domain Mark 1.0LD5655.V855 1903.P555VinegarThesishttp://scholar.lib.vt.edu/theses/available/etd-09092008-063425/