RT Journal Article SR Electronic T1 Abstract JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 150 OP 150 DO 10.48044/joa.1975.1.8.150 VO 1 IS 8 YR 1975 UL http://auf.isa-arbor.com/content/1/8/150.abstract AB