RT Journal Article SR Electronic T1 Staffing for the ‘90’s JF Arboriculture & Urban Forestry (AUF) FD International Society of Arboriculture SP 322 OP 325 DO 10.48044/jauf.1990.070 VO 16 IS 12 A1 Hendrickson, John YR 1990 UL http://auf.isa-arbor.com/content/16/12/322.abstract AB