RT Journal Article SR Electronic T1 Warning: Topping Is Hazardous To Your Tree’s Health! JF Arboriculture & Urban Forestry JO JOA FD International Society of Arboriculture SP 50 OP 52 DO 10.48044/jauf.1986.011 VO 12 IS 2 A1 Kaiser, C. A. A1 Witt, M. L. A1 Hartman, J. R. A1 McNiel, R. E. A1 Dunwell, W. C. YR 1986 UL http://auf.isa-arbor.com/content/12/2/50.abstract