RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 12 OP 12 DO 10.48044/joa.1980.6.1.12 VO 6 IS 1 YR 1980 UL http://auf.isa-arbor.com/content/6/1/12.abstract AB