RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 268 OP 268 DO 10.48044/joa.1988.14.11.268 VO 14 IS 11 YR 1988 UL http://auf.isa-arbor.com/content/14/11/268.abstract AB