RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 53 OP 53 DO 10.48044/joa.1975.1.3.53 VO 1 IS 3 YR 1975 UL http://auf.isa-arbor.com/content/1/3/53.abstract AB