RT Journal Article SR Electronic T1 Davey’s Plant Health Care JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 285 OP 287 DO 10.48044/jauf.1988.069 VO 14 IS 12 A1 Roger Funk YR 1988 UL http://auf.isa-arbor.com/content/14/12/285.abstract AB