RT Journal Article SR Electronic T1 Abstracts JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 113 OP 113 DO 10.48044/joa.1976.2.6.113 VO 2 IS 6 YR 1976 UL http://auf.isa-arbor.com/content/2/6/113.abstract AB