RT Journal Article SR Electronic T1 ABSTRACT JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 277 OP 277 DO 10.48044/joa.1985.11.9.277 VO 11 IS 9 YR 1985 UL http://auf.isa-arbor.com/content/11/9/277.abstract AB