RT Journal Article SR Electronic T1 Abstracts JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 301 OP 301 DO 10.48044/joa.1988.14.12.301 VO 14 IS 12 YR 1988 UL http://auf.isa-arbor.com/content/14/12/301.abstract AB