RT Journal Article SR Electronic T1 Abstracts JF Arboriculture & Urban Forestry (AUF) FD International Society of Arboriculture SP 216 OP 216 DO 10.48044/joa.1982.8.8.216 VO 8 IS 8 YR 1982 UL http://auf.isa-arbor.com/content/8/8/216.abstract AB