作者 | Albert T. Schuler / E. Paul Craft / Franklin B. Lewis / H. Clay Smith / Keith F. Jensen / Northeastern Forest Experiment Station (Radnor, Pa.) / Wilbur F. LaPage / G. R. Trimble / Gerald Leon Cole / John E. Baumgras / Leon S. Dochinger / Michael L. McManus / Walter Basil Wallin / Noel F. Schneeberger / Paul S. DeBald |