A PHD thesis taking a historical geography approach, courtesy of medievalist.net :
http://ir.lib.uwo.ca/cgi/viewcontent.cgi?article=5146&context=etd
(http://ir.lib.uwo.ca/cgi/viewcontent.cgi?article=5146&context=etd)
Knowing the interests of many members in this battle, I thought it post it here, though I haven't had a chance to read it yet. I did notice, however, that it proposes an alternative battle site.