RT Journal Article SR Electronic T1 Have We Been Preaching the Same Sermon for 60 Years? JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 9 OP 12 DO 10.48044/jauf.1984.003 VO 10 IS 1 A1 Michael J. Walterscheidt YR 1984 UL http://auf.isa-arbor.com/content/10/1/9.abstract AB