Arthur H. Holmgren · David P. Lowery · Ed F. Wicker · Hal E. Anderson · L. Jack Lyon · Richard C. Rothermel · Roger S. Peterson · Roscoe Burwell Herrington · William Richard Beaufait · Erwin Carl Olaf Erickson
Jan 1966 · Intermountain Forest & Range Experiment Station, Forest Service, U.S. Department of Agriculture