RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 181 OP 181 DO 10.48044/joa.1985.11.6.181 VO 11 IS 6 YR 1985 UL http://auf.isa-arbor.com/content/11/6/181.abstract AB