RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 69 OP 69 DO 10.48044/joa.1988.14.3.69 VO 14 IS 3 YR 1988 UL http://auf.isa-arbor.com/content/14/3/69.abstract AB