RT Journal Article SR Electronic T1 Development and Implementation of Plant Health Care Programs JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 45 OP 48 DO 10.48044/jauf.1992.011 VO 18 IS 1 A1 Paul D. Marsan A1 Brian Hanson YR 1992 UL http://auf.isa-arbor.com/content/18/1/45.abstract AB