Author Affiliations +
Darren A. Miller,* T. Bently Wigley*
** Address for Darren A. Miller: Weyerhaeuser Company, Southern Timberlands R&D, Box 2288, Columbus, MS 39704, USA; darren.miller@weyerhaeuser.com. Address for T. Bently Wigley: National Council for Air and Stream Improvement, Inc., P.O. Box 34031, Clemson, SC 29634-03620317, USA.