F. Bryan Clark, technical editor, Jay G. Hutchinson, editor ; a cooperative project by the USDA Forest Service, Northeastern Area, State and Private Forestry, Northeastern Forest Experiment Station, North Central Forest Experiment Station, Sourthern Forest Experiment Station
John A. Sturos, compiler ; sponsored by Department of Forestry, Michigan Technological University; North Central Forest Experiment Station, USDA Forest Service; Bay de Noc Community College; Michigan Association of Timbermen; Michigan-Wisconsin Timber Producers Association