RT Journal Article SR Electronic T1 Abstracts JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 88 OP 88 DO 10.48044/joa.1990.16.4.88 VO 16 IS 4 YR 1990 UL http://auf.isa-arbor.com/content/16/4/88.abstract AB