作者 | Alexander Clark / Earl R. Sluder / Frank A. Bennett / Gerald A. Koenigshof / John E. Duff / Michael A. Taras / Ralph Melvin Nelson (Jr.) / Richard L. Ragatz / Stephen G. Boyce / W. Henry McNab / Southeastern Forest Experiment Station (Asheville, N.C.) / Douglas R. Phillips / H. Ken Cordell / Herbert A. Knight / James G. Schroeder |