RT Journal Article SR Electronic T1 Errata JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 52 OP 52 DO 10.48044/jauf.1989.012 VO 15 IS 2 YR 1989 UL http://auf.isa-arbor.com/content/15/2/52.abstract AB