----- Original Message ----- > I'm interested in this area....in addition to film, > anyone know any writing which discusses it? Two interesting writings on TBWP that I found online... http://jefferson.village.virginia.edu/pmc/text-only/issue.999/10.1.r_banash. txt http://pcasacas.org.seanic11.net/SPC/22.3/keller2.html Hope this helps, Andrew