Dear David, I'm not sure, but you might find something useful there: www.sddc.army.mil/sddc/ Content/Pub/11467/Attachment3.pdf
HTH Kind regards. Leo ------------------------------------------------------------ Chavas Leonard, Ph.D. Research Associate ------------------------------------------------------------ Faculty of Life Sciences The University of Manchester The Michael Smith Building Oxford Road Manchester Lancashire M13 9PT ------------------------------------------------------------ Tel: +44(0)161-275-1586 e-mail: [EMAIL PROTECTED]