RT Journal Article SR Electronic T1 Computers and Distribution Tree Maintenance Programs JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 104 OP 106 DO 10.48044/jauf.1978.024 VO 4 IS 5 A1 Eric Ulrich YR 1978 UL http://auf.isa-arbor.com/content/4/5/104.abstract