RT Journal Article SR Electronic T1 Abstracts JF Arboriculture & Urban Forestry (AUF) FD International Society of Arboriculture SP 12 OP 12 DO 10.48044/joa.1982.8.1.12 VO 8 IS 1 YR 1982 UL http://auf.isa-arbor.com/content/8/1/12.abstract AB